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https://github.com/Alfresco/alfresco-community-repo.git
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ab4ca7177f
51903 to 54309 git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@54310 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
1103 lines
36 KiB
Java
1103 lines
36 KiB
Java
/*
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* Copyright (C) 2005-2013 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.management.subsystems;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Properties;
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import java.util.Set;
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import java.util.concurrent.locks.ReentrantReadWriteLock;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.BeansException;
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import org.springframework.beans.factory.BeanNameAware;
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import org.springframework.beans.factory.DisposableBean;
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import org.springframework.beans.factory.InitializingBean;
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import org.springframework.context.ApplicationContext;
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import org.springframework.context.ApplicationContextAware;
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import org.springframework.context.ApplicationEvent;
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import org.springframework.context.ApplicationListener;
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import org.springframework.context.event.ContextRefreshedEvent;
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import org.springframework.util.PropertyPlaceholderHelper;
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/**
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* A base class for {@link PropertyBackedBean}s. Gets its category from its Spring bean name and automatically
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* propagates and resolves property defaults on initialization. Automatically destroys itself on server shutdown.
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* Communicates its creation and destruction and start and stop events to a {@link PropertyBackedBeanRegistry}. Listens
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* for start and stop events from remote nodes in order to keep the bean in sync with edits made on a remote node. On
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* receiving a start event from a remote node, the bean is completely reinitialized, allowing it to be resynchronized
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* with any persisted changes.
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*
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* @author dward
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*/
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public abstract class AbstractPropertyBackedBean implements PropertyBackedBean, ApplicationContextAware,
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ApplicationListener<ApplicationEvent>, InitializingBean, DisposableBean, BeanNameAware
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{
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/**
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* When true, calls to setProperties / setProperty are persisted to the MBean if it exists.
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*/
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private boolean saveSetProperty = false;
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/** The default final part of an ID. */
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protected static final String DEFAULT_INSTANCE_NAME = "default";
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/** The parent application context. */
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private ApplicationContext parent;
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/** The registry of all property backed beans. */
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private PropertyBackedBeanRegistry registry;
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/** The category (first part of the ID). */
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private String category;
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/** The bean name if we have been initialized by Spring. */
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private String beanName;
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/** The hierarchical instance path within the category (second part of the ID). */
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private List<String> instancePath = Collections.singletonList(AbstractPropertyBackedBean.DEFAULT_INSTANCE_NAME);
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/** The combined unique id. */
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private List<String> id;
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/** Should the application context be started on startup of the parent application?. */
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private boolean autoStart;
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/** Property defaults provided by the installer or System properties. */
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private Properties propertyDefaults;
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/** Resolves placeholders in the property defaults. */
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private DefaultResolver defaultResolver = new DefaultResolver();
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/** The lifecycle states. */
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private enum RuntimeState {UNINITIALIZED, STOPPED, PENDING_BROADCAST_START, STARTED};
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private RuntimeState runtimeState = RuntimeState.UNINITIALIZED;
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/** The state. */
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private PropertyBackedBeanState state;
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/** Lock for concurrent access. */
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protected ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
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/**
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* Used in conjunction with {@link #localSetProperties} to control setting of
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* properties from either a JMX client or by code in the local Alfresco
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* node calling {@link AbstractPropertyBackedBean#setProperties(Map)} or
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* {@link AbstractPropertyBackedBean#setProperty(String, String)}.
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* Is <code>true</code> when there is a nested call to either of these
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* methods. This is the case when there is an MBean AND one of these method was
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* NOT originally called from that MBean (it is a local code).
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*/
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private ThreadLocal<Boolean> nestedCall = new ThreadLocal<Boolean>()
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{
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@Override
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protected Boolean initialValue()
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{
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return false;
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}
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};
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/**
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* Used in conjunction with {@link #nestedCall} to control setting of
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* properties from either a JMX client or by code in the local Alfresco
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* node calling {@link AbstractPropertyBackedBean#setProperties(Map)} or
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* {@link AbstractPropertyBackedBean#setProperty(String, String)}.
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* Is set to <code>true</code> when there is a nested call back from
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* a JMX bean.
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*/
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private ThreadLocal<Boolean> localSetProperties = new ThreadLocal<Boolean>()
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{
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@Override
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protected Boolean initialValue()
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{
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return false;
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}
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};
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/** The logger. */
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private static Log logger = LogFactory.getLog(AbstractPropertyBackedBean.class);
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/*
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* (non-Javadoc)
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* @see org.springframework.context.ApplicationContextAware#setApplicationContext(org.springframework.context.
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* ApplicationContext)
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*/
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public void setApplicationContext(ApplicationContext applicationContext) throws BeansException
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{
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this.parent = applicationContext;
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}
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/**
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* Sets the registry of all property backed beans.
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*
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* @param registry
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* the registry of all property backed beans
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*/
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public void setRegistry(PropertyBackedBeanRegistry registry)
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{
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this.registry = registry;
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}
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/**
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* Gets the registry of all property backed beans.
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*
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* @return the registry of all property backed beans
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*/
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protected PropertyBackedBeanRegistry getRegistry()
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{
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return this.registry;
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}
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/*
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* (non-Javadoc)
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* @see org.springframework.beans.factory.BeanNameAware#setBeanName(java.lang.String)
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*/
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public void setBeanName(String name)
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{
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this.beanName = name;
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}
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/**
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* Sets the category (first part of the ID).
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*
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* @param category
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* the category
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*/
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public void setCategory(String category)
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{
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this.category = category;
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}
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/**
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* Sets the hierarchical instance path within the category (second part of the ID)..
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*
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* @param instancePath
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* the instance path
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*/
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public void setInstancePath(List<String> instancePath)
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{
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this.instancePath = instancePath;
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}
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/**
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* Indicates whether the bean should be started on startup of the parent application context.
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*
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* @param autoStart
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* <code>true</code> if the bean should be started on startup of the parent application context
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*/
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public void setAutoStart(boolean autoStart)
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{
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this.autoStart = autoStart;
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}
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/**
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* Sets the property defaults provided by the installer or System properties.
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*
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* @param propertyDefaults
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* the property defaults
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*/
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public void setPropertyDefaults(Properties propertyDefaults)
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{
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this.propertyDefaults = propertyDefaults;
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}
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/**
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* Gets the property defaults provided by the installer or System properties.
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*
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* @return the property defaults
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*/
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protected Properties getPropertyDefaults()
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{
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return this.propertyDefaults;
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}
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/**
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* Resolves the default value of a property, if there is one, expanding placholders as necessary.
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*
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* @param name
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* the property name
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* @return the resolved default value or <code>null</code> if there isn't one
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*/
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protected String resolveDefault(String name)
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{
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String value = this.propertyDefaults.getProperty(name);
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if (value != null)
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{
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value = this.defaultResolver.resolveValue(value);
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}
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return value;
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}
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/**
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* Gets the parent application context.
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*
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* @return the parent application context
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*/
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protected ApplicationContext getParent()
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{
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return this.parent;
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}
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/**
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* Gets the state.
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*
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* @param start
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* are we making use of the state? I.e. should we start it if it has not been already?
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* @return the state
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*/
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protected PropertyBackedBeanState getState(boolean start)
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{
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if (start)
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{
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start(true, false);
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}
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return this.state;
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}
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/**
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* When set to true, calls to setProperties / setProperty are persisted to the MBean if it exists.
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*/
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public void setSaveSetProperty(boolean saveSetProperty)
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{
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this.saveSetProperty = saveSetProperty;
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}
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/**
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* {@inheritDoc}
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*/
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public void afterPropertiesSet() throws Exception
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{
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// Default the category to the bean name
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if (this.category == null)
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{
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if (this.beanName == null)
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{
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throw new IllegalStateException("Category not provided");
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}
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this.category = this.beanName;
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}
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// Derive the unique ID from the category and instance path
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List<String> path = getInstancePath();
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this.id = new ArrayList<String>(path.size() + 1);
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this.id.add(this.category);
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this.id.addAll(getInstancePath());
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init();
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}
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/**
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* Initializes or resets the bean and its state.
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*/
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public final void init()
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{
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this.lock.writeLock().lock();
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try
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{
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doInit();
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}
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finally
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{
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this.lock.writeLock().unlock();
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}
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}
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/**
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* Initializes or resets the bean and its state.
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*/
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protected void doInit()
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{
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boolean hadWriteLock = this.lock.isWriteLockedByCurrentThread();
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if (this.runtimeState == RuntimeState.UNINITIALIZED)
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{
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if (!hadWriteLock)
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{
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this.lock.readLock().unlock();
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this.lock.writeLock().lock();
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}
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try
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{
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if (this.runtimeState == RuntimeState.UNINITIALIZED)
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{
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logger.debug("doInit() createInitialState");
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this.state = createInitialState();
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logger.debug("doInit() applyDefaultOverrides "+state);
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applyDefaultOverrides(this.state);
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this.runtimeState = RuntimeState.STOPPED;
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logger.debug("doInit() register");
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this.registry.register(this);
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logger.debug("doInit() done");
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}
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}
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catch (IOException e)
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{
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throw new RuntimeException(e);
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}
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finally
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{
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logger.debug("doInit() state="+runtimeState);
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if (!hadWriteLock)
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{
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this.lock.readLock().lock();
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this.lock.writeLock().unlock();
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}
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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public final void revert()
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{
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this.lock.writeLock().lock();
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try
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{
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stop(true);
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destroy(true);
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doInit();
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}
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finally
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{
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this.lock.writeLock().unlock();
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}
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}
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/**
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* Creates the initial state.
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*
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* @return the property backed bean state
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* @throws IOException
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* Signals that an I/O exception has occurred.
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*/
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protected abstract PropertyBackedBeanState createInitialState() throws IOException;
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/**
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* Applies default overrides to the initial state.
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*
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* @param state
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* the state
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* @throws IOException
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* Signals that an I/O exception has occurred.
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*/
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protected void applyDefaultOverrides(PropertyBackedBeanState state) throws IOException
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{
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for (String name : state.getPropertyNames())
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{
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String override = resolveDefault(name);
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if (override != null)
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{
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state.setProperty(name, override);
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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public List<String> getId()
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{
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return this.id;
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}
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/**
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* Gets the category.
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*
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* @return the category
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*/
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protected String getCategory()
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{
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return this.category;
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}
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/**
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* Gets the hierarchical instance path within the category (second part of the ID).
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*
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* @return the instance path
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*/
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protected List<String> getInstancePath()
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{
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return this.instancePath;
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}
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/**
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* {@inheritDoc}
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*/
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public final void destroy()
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{
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this.lock.writeLock().lock();
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try
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{
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destroy(false);
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}
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finally
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{
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this.lock.writeLock().unlock();
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}
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}
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/**
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* Releases any resources held by this component.
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*
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* @param isPermanent
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* is the component being destroyed forever, i.e. should persisted values be removed? On server shutdown,
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* this value would be <code>false</code>, whereas on the removal of a dynamically created instance, this
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* value would be <code>true</code>.
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*/
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protected void destroy(boolean isPermanent)
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{
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if (this.runtimeState != RuntimeState.UNINITIALIZED)
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{
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boolean hadWriteLock = this.lock.isWriteLockedByCurrentThread();
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if (!hadWriteLock)
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{
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this.lock.readLock().unlock();
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this.lock.writeLock().lock();
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}
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try
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{
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if (this.runtimeState != RuntimeState.UNINITIALIZED)
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{
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logger.debug("destroy() stop state="+runtimeState);
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stop(false);
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logger.debug("destroy() deregister "+isPermanent);
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this.registry.deregister(this, isPermanent);
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this.state = null;
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this.runtimeState = RuntimeState.UNINITIALIZED;
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logger.debug("destroy() done");
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}
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}
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finally
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{
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logger.debug("destroy() state="+runtimeState);
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if (!hadWriteLock)
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{
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this.lock.readLock().lock();
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this.lock.writeLock().unlock();
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}
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isUpdateable(String name)
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{
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public String getDescription(String name)
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{
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return isUpdateable(name) ? "Editable Property " + name : "Read-only Property " + name;
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}
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/**
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* {@inheritDoc}
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*/
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public void onApplicationEvent(ApplicationEvent event)
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{
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if (this.autoStart && event instanceof ContextRefreshedEvent && event.getSource() == this.parent)
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{
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this.lock.writeLock().lock();
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try
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{
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start(false, false);
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}
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catch (Exception e)
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{
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// Let's log and swallow auto-start exceptions so that they are non-fatal. This means that the system
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// can hopefully be brought up to a level where its configuration can be edited and corrected
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logger.error("Error auto-starting subsystem", e);
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}
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finally
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{
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this.lock.writeLock().unlock();
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}
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}
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else if (event instanceof PropertyBackedBeanStartedEvent)
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{
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this.lock.writeLock().lock();
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try
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{
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// If we aren't started, reinitialize so that we pick up state changes from the database
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switch (this.runtimeState)
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{
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case PENDING_BROADCAST_START:
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case STOPPED:
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destroy(false);
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// fall through
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case UNINITIALIZED:
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start(false, false);
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}
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}
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finally
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{
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this.lock.writeLock().unlock();
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}
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}
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else if (event instanceof PropertyBackedBeanStoppedEvent)
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{
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this.lock.writeLock().lock();
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try
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{
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// Completely destroy the state so that it will have to be reinitialized should the bean be put back in
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// to use by this node
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destroy(false);
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}
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finally
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{
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this.lock.writeLock().unlock();
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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public String getProperty(String name)
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{
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this.lock.readLock().lock();
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try
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{
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doInit();
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return this.state.getProperty(name);
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}
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finally
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{
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this.lock.readLock().unlock();
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}
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}
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/**
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* {@inheritDoc}
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*/
|
|
public Set<String> getPropertyNames()
|
|
{
|
|
this.lock.readLock().lock();
|
|
try
|
|
{
|
|
doInit();
|
|
return this.state.getPropertyNames();
|
|
}
|
|
finally
|
|
{
|
|
this.lock.readLock().unlock();
|
|
}
|
|
}
|
|
|
|
private void setPropertyInternal(String name, String value)
|
|
{
|
|
// Bring down the bean. The caller may have already broadcast this across the cluster
|
|
stop(false);
|
|
doInit();
|
|
this.state.setProperty(name, value);
|
|
}
|
|
|
|
private void setPropertiesInternal(Map<String, String> properties)
|
|
{
|
|
// Bring down the bean. The caller may have already broadcast this across the cluster
|
|
stop(false);
|
|
doInit();
|
|
|
|
Map<String, String> previousValues = new HashMap<String, String>(properties.size() * 2);
|
|
try
|
|
{
|
|
// Set each of the properties and back up their previous values just in case
|
|
for (Map.Entry<String, String> entry : properties.entrySet())
|
|
{
|
|
String property = entry.getKey();
|
|
String previousValue = this.state.getProperty(property);
|
|
this.state.setProperty(property, entry.getValue());
|
|
previousValues.put(property, previousValue);
|
|
}
|
|
|
|
// Attempt to start locally
|
|
start(false, true);
|
|
|
|
// We still haven't broadcast the start - a persist is required first so this will be done by the caller
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
// Oh dear - something went wrong. So restore previous state before rethrowing
|
|
for (Map.Entry<String, String> entry : previousValues.entrySet())
|
|
{
|
|
this.state.setProperty(entry.getKey(), entry.getValue());
|
|
}
|
|
|
|
// Bring the bean back up across the cluster
|
|
start(true, false);
|
|
if (e instanceof RuntimeException)
|
|
{
|
|
throw (RuntimeException) e;
|
|
}
|
|
throw new IllegalStateException(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*
|
|
* <p> When called from code within the local node the values are saved to the
|
|
* database in the Enterprise edition and will be visible in a JMX client.<p>
|
|
*
|
|
* @param name
|
|
* @param value
|
|
*/
|
|
public void setProperty(String name, String value)
|
|
{
|
|
if (logger.isDebugEnabled())
|
|
{
|
|
logger.debug("setProperty("+name+','+value+")");
|
|
}
|
|
if (!nestedCall.get())
|
|
{
|
|
nestedCall.set(true);
|
|
this.lock.writeLock().lock();
|
|
try
|
|
{
|
|
boolean mBeanInfoChange = !getPropertyNames().contains(name);
|
|
|
|
// When setting properties locally AND there is an MBean, the following broadcast
|
|
// results in a call to the MBean's setAttributes method, which in turn results
|
|
// in a nested call back. The call back sets the values in this bean and
|
|
// localSetProperties will be set to true. The MBean persists the changes and the
|
|
// broadcast method returns. If there is no MBean (community edition) OR when
|
|
// initiated from the MBean (say setting a value via JConsole), nothing happens
|
|
// as a result of the broadcast.
|
|
if (saveSetProperty)
|
|
{
|
|
logger.debug("setProperty() broadcastSetProperties");
|
|
this.registry.broadcastSetProperty(this, name, value);
|
|
}
|
|
|
|
if (localSetProperties.get())
|
|
{
|
|
if (mBeanInfoChange)
|
|
{
|
|
// Re register the bean so new properties are visible in JConsole which does
|
|
// not check MBeanInfo for changes otherwise.
|
|
logger.debug("setProperty() destroy");
|
|
// Commented out to avoid "UserTransaction is not visible from class loader" as it drops the context.
|
|
// So we have to just live with the JConsole as it is.
|
|
// destroy(false);
|
|
|
|
// Attempt to start locally
|
|
start(false, true);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
logger.debug("setProperty() setPropertyInternal");
|
|
setPropertyInternal(name, value);
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
localSetProperties.set(false);
|
|
nestedCall.set(false);
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// A nested call indicates there is a MBean and that this method was
|
|
// NOT originally called from that MBean.
|
|
localSetProperties.set(true);
|
|
|
|
logger.debug("setProperty() callback setPropertyInternal");
|
|
setPropertyInternal(name, value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*
|
|
* <p> When called from code within the local node the values are saved to the
|
|
* database in the Enterprise edition and will be visible in a JMX client.<p>
|
|
*
|
|
* @param properties to be saved.
|
|
*/
|
|
public void setProperties(Map<String, String> properties)
|
|
{
|
|
if (logger.isDebugEnabled())
|
|
{
|
|
logger.debug("setProperties("+properties+")");
|
|
}
|
|
if (!nestedCall.get())
|
|
{
|
|
nestedCall.set(true);
|
|
|
|
boolean hadWriteLock = this.lock.isWriteLockedByCurrentThread();
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.writeLock().lock();
|
|
}
|
|
try
|
|
{
|
|
boolean mBeanInfoChange = !getPropertyNames().containsAll(properties.keySet());
|
|
|
|
// When setting properties locally AND there is an MBean, the following broadcast
|
|
// results in a call to the MBean's setAttributes method, which in turn results
|
|
// in a nested call back. The call back sets the values in this bean and
|
|
// localSetProperties will be set to true. The MBean persists the changes and the
|
|
// broadcast method returns. If there is no MBean (community edition) OR when
|
|
// initiated from the MBean (say setting a value via JConsole), nothing happens
|
|
// as a result of the broadcast.
|
|
if (saveSetProperty)
|
|
{
|
|
logger.debug("setProperties() broadcastSetProperties");
|
|
this.registry.broadcastSetProperties(this, properties);
|
|
}
|
|
|
|
if (localSetProperties.get())
|
|
{
|
|
if (mBeanInfoChange)
|
|
{
|
|
// Re register the bean so new properties are visible in JConsole which does
|
|
// not check MBeanInfo for changes otherwise.
|
|
logger.debug("setProperties() destroy");
|
|
// Commented out to avoid "UserTransaction is not visible from class loader" as it drops the context.
|
|
// So we have to just live with the JConsole as it is.
|
|
// destroy(false);
|
|
|
|
// Attempt to start locally
|
|
start(true, false);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
logger.debug("setProperties() setPropertiesInternal");
|
|
setPropertiesInternal(properties);
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
localSetProperties.set(false);
|
|
nestedCall.set(false);
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// A nested call indicates there is a MBean and that this method was
|
|
// NOT originally called from that MBean.
|
|
localSetProperties.set(true);
|
|
|
|
logger.debug("setProperties() callback setPropertiesInternal");
|
|
setPropertiesInternal(properties);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes a property added by code within the local node.
|
|
*
|
|
* @param propertyNames to be removed.
|
|
*/
|
|
public void removeProperty(String name)
|
|
{
|
|
removeProperties(Collections.singleton(name));
|
|
}
|
|
|
|
/**
|
|
* Removes properties added by code within the local node.
|
|
*
|
|
* @param propertyNames to be removed.
|
|
*/
|
|
public void removeProperties(Collection<String> properties)
|
|
{
|
|
if (logger.isDebugEnabled())
|
|
{
|
|
logger.debug("removeProperties("+properties+")");
|
|
}
|
|
if (!nestedCall.get())
|
|
{
|
|
nestedCall.set(true);
|
|
|
|
boolean hadWriteLock = this.lock.isWriteLockedByCurrentThread();
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.writeLock().lock();
|
|
}
|
|
try
|
|
{
|
|
boolean mBeanInfoChange = !getPropertyNames().containsAll(properties);
|
|
|
|
// When setting properties locally AND there is an MBean, the following broadcast
|
|
// results in a call to the MBean's setAttributes method, which in turn results
|
|
// in a nested call back. The call back sets the values in this bean and
|
|
// localSetProperties will be set to true. The MBean persists the changes and the
|
|
// broadcast method returns. If there is no MBean (community edition) OR when
|
|
// initiated from the MBean (say setting a value via JConsole), nothing happens
|
|
// as a result of the broadcast.
|
|
if (saveSetProperty)
|
|
{
|
|
logger.debug("removeProperties() broadcastRemoveProperties");
|
|
this.registry.broadcastRemoveProperties(this, properties);
|
|
}
|
|
|
|
if (localSetProperties.get())
|
|
{
|
|
if (mBeanInfoChange)
|
|
{
|
|
// Re register the bean so new properties are visible in JConsole which does
|
|
// not check MBeanInfo for changes otherwise.
|
|
logger.debug("removeProperties() destroy");
|
|
// Commented out to avoid "UserTransaction is not visible from class loader" as it drops the context.
|
|
// So we have to just live with the JConsole as it is.
|
|
// destroy(false);
|
|
|
|
// Attempt to start locally
|
|
start(true, false);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
logger.debug("removeProperties() removePropertiesInternal");
|
|
removePropertiesInternal(properties);
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
localSetProperties.set(false);
|
|
nestedCall.set(false);
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// A nested call indicates there is a MBean and that this method was
|
|
// NOT originally called from that MBean.
|
|
localSetProperties.set(true);
|
|
|
|
logger.debug("removeProperties() callback removePropertiesInternal");
|
|
removePropertiesInternal(properties);
|
|
}
|
|
}
|
|
|
|
private void removePropertiesInternal(Collection<String> properties)
|
|
{
|
|
// Bring down the bean. The caller may have already broadcast this across the cluster
|
|
stop(false);
|
|
doInit();
|
|
|
|
Map<String, String> previousValues = new HashMap<String, String>(properties.size() * 2);
|
|
try
|
|
{
|
|
// Set each of the properties and back up their previous values just in case
|
|
for (String property : properties)
|
|
{
|
|
String previousValue = state.getProperty(property);
|
|
this.state.removeProperty(property);
|
|
previousValues.put(property, previousValue);
|
|
}
|
|
|
|
// Attempt to start locally
|
|
start(false, true);
|
|
|
|
// We still haven't broadcast the start - a persist is required first so this will be done by the caller
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
// Oh dear - something went wrong. So restore previous state before rethrowing
|
|
for (Map.Entry<String, String> entry : previousValues.entrySet())
|
|
{
|
|
this.state.setProperty(entry.getKey(), entry.getValue());
|
|
}
|
|
|
|
// Bring the bean back up across the cluster
|
|
start(true, false);
|
|
if (e instanceof RuntimeException)
|
|
{
|
|
throw (RuntimeException) e;
|
|
}
|
|
throw new IllegalStateException(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public final void start()
|
|
{
|
|
this.lock.writeLock().lock();
|
|
try
|
|
{
|
|
start(true, false);
|
|
}
|
|
finally
|
|
{
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Starts the bean, optionally broadcasting the event to remote nodes.
|
|
*
|
|
* @param broadcastNow
|
|
* Should the event be broadcast immediately?
|
|
* @param broadcastLater
|
|
* Should the event be broadcast ever?
|
|
*/
|
|
protected void start(boolean broadcastNow, boolean broadcastLater)
|
|
{
|
|
boolean hadWriteLock = this.lock.isWriteLockedByCurrentThread();
|
|
if (this.runtimeState != RuntimeState.STARTED)
|
|
{
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.readLock().unlock();
|
|
this.lock.writeLock().lock();
|
|
}
|
|
try
|
|
{
|
|
switch (this.runtimeState)
|
|
{
|
|
case UNINITIALIZED:
|
|
doInit();
|
|
// fall through
|
|
case STOPPED:
|
|
this.state.start();
|
|
this.runtimeState = broadcastLater ? RuntimeState.PENDING_BROADCAST_START : RuntimeState.STARTED;
|
|
// fall through
|
|
case PENDING_BROADCAST_START:
|
|
if (broadcastNow)
|
|
{
|
|
this.registry.broadcastStart(this);
|
|
this.runtimeState = RuntimeState.STARTED;
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.readLock().lock();
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public final void stop()
|
|
{
|
|
this.lock.writeLock().lock();
|
|
try
|
|
{
|
|
stop(true);
|
|
}
|
|
finally
|
|
{
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stops the bean, optionally broadcasting the event to remote nodes.
|
|
*
|
|
* @param broadcast
|
|
* Should the event be broadcast?
|
|
*/
|
|
protected void stop(boolean broadcast)
|
|
{
|
|
boolean hadWriteLock = this.lock.isWriteLockedByCurrentThread();
|
|
switch (this.runtimeState)
|
|
{
|
|
case PENDING_BROADCAST_START:
|
|
case STARTED:
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.readLock().unlock();
|
|
this.lock.writeLock().lock();
|
|
}
|
|
try
|
|
{
|
|
switch (this.runtimeState)
|
|
{
|
|
case STARTED:
|
|
if (broadcast)
|
|
{
|
|
this.registry.broadcastStop(this);
|
|
}
|
|
// fall through
|
|
case PENDING_BROADCAST_START:
|
|
this.state.stop();
|
|
this.runtimeState = RuntimeState.STOPPED;
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (!hadWriteLock)
|
|
{
|
|
this.lock.readLock().lock();
|
|
this.lock.writeLock().unlock();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Uses a Spring {@link PropertyPlaceholderHelper} to resolve placeholders in the property defaults. This means
|
|
* that placeholders need not be displayed in the configuration UI or JMX console.
|
|
*/
|
|
public class DefaultResolver extends PropertyPlaceholderHelper
|
|
{
|
|
|
|
/**
|
|
* Instantiates a new default resolver.
|
|
*/
|
|
public DefaultResolver()
|
|
{
|
|
super("${", "}", ":", true);
|
|
}
|
|
|
|
/**
|
|
* Expands the given value, resolving any ${} placeholders using the property defaults.
|
|
*
|
|
* @param val
|
|
* the value to expand
|
|
* @return the expanded value
|
|
*/
|
|
public String resolveValue(String val)
|
|
{
|
|
return AbstractPropertyBackedBean.this.propertyDefaults == null ? null : replacePlaceholders(
|
|
val, AbstractPropertyBackedBean.this.propertyDefaults);
|
|
}
|
|
|
|
}
|
|
}
|