Updated Workflow Interpreter to extend from BaseInterpreter, in preparation for other console interpreters such as WebClientConfig admin console.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@6662 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/admin/BaseInterpreter.java

@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2005-2007 Alfresco Software Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of
+ * the GPL, you may redistribute this Program in connection with Free/Libre
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's
+ * FLOSS exception.  You should have recieved a copy of the text describing
+ * the FLOSS exception, and it is also available here:
+ * http://www.alfresco.com/legal/licensing"
+ */
+package org.alfresco.repo.admin;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import org.alfresco.repo.security.authentication.AuthenticationUtil;
+import org.alfresco.repo.security.authentication.AuthenticationUtil.RunAsWork;
+import org.alfresco.repo.tenant.TenantService;
+import org.alfresco.repo.transaction.RetryingTransactionHelper.RetryingTransactionCallback;
+import org.alfresco.service.transaction.TransactionService;
+import org.alfresco.util.AbstractLifecycleBean;
+import org.alfresco.util.ApplicationContextHelper;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationEvent;
+
+/**
+ * An interactive console
+ *
+ */
+public abstract class BaseInterpreter extends AbstractLifecycleBean
+{
+    // dependencies
+    protected TransactionService transactionService;
+    protected TenantService tenantService;
+
+
+    /**4
+     * The reader for interaction.
+     */
+    private BufferedReader fIn;
+
+    /**
+     * Current context
+     */
+    private String username = null;       
+    protected final static String DEFAULT_ADMIN = "admin";
+    
+    /**
+     * Last command issued
+     */
+    protected String lastCommand = null;
+    
+
+    /**
+     * Main entry point.
+     */
+    public static void main(String[] args)
+    {
+        ApplicationContext context = ApplicationContextHelper.getApplicationContext();
+        
+        BaseInterpreter console = getConsoleBean(context);
+
+        console.username = DEFAULT_ADMIN;
+        console.rep();
+        System.exit(0);
+    }
+    
+    public static BaseInterpreter getConsoleBean(ApplicationContext context)
+    {
+        return null;
+    }
+
+    /**
+     * Make up a new console.
+     */
+    public BaseInterpreter()
+    {
+        fIn = new BufferedReader(new InputStreamReader(System.in));
+    }
+    
+    
+    public void setTransactionService(TransactionService transactionService)
+    {
+        this.transactionService = transactionService;
+    }
+
+    public void setTenantService(TenantService tenantService)
+    {
+        this.tenantService = tenantService;
+    }   
+    
+
+
+    /**
+     * A Read-Eval-Print loop.
+     */
+    public void rep()
+    {
+        // accept commands
+        while (true)
+        {
+            System.out.print("ok> ");
+            try
+            {
+                // get command
+                final String line = fIn.readLine();
+                if (line.equals("exit") || line.equals("quit"))
+                {
+                    return;
+                }
+
+                // execute command in context of currently selected user
+                long startms = System.currentTimeMillis();
+                System.out.print(interpretCommand(line));
+                System.out.println("" + (System.currentTimeMillis() - startms) + "ms");
+
+            }
+            catch (Throwable t)
+            {
+                t.printStackTrace(System.err);
+                System.out.println("");
+            }
+        }
+    }
+
+    /**
+     * Interpret a single command using the BufferedReader passed in for any data needed.
+     *
+     * @param line The unparsed command
+     * @return The textual output of the command.
+     */
+    public String interpretCommand(final String line)
+        throws IOException
+    {
+        String currentUserName = getCurrentUserName();
+        if (hasAuthority(currentUserName))
+        {        
+            // execute command in context of currently selected user
+            return AuthenticationUtil.runAs(new RunAsWork<String>()
+            {
+                public String doWork() throws Exception
+                {
+                    RetryingTransactionCallback<String> txnWork = new RetryingTransactionCallback<String>()
+                    {
+                        public String execute() throws Exception
+                        {
+                            return executeCommand(line);
+                        }
+                    };
+                    return transactionService.getRetryingTransactionHelper().doInTransaction(txnWork);
+                }
+            }, currentUserName);
+        }
+        else
+        {
+            return("Error: User '"+ currentUserName + "' not authorised");
+        }
+    }
+    
+    protected boolean hasAuthority(String username)
+    {
+        return ((username != null) && (tenantService.getBaseNameUser(username).equals(DEFAULT_ADMIN)));
+    }
+
+    /**
+     * Execute a single command using the BufferedReader passed in for any data needed.
+     *
+     * TODO: Use decent parser!
+     *
+     * @param line The unparsed command
+     * @return The textual output of the command.
+     */
+    protected abstract String executeCommand(String line) throws IOException;
+  
+    /**
+     * Get current user name
+     * 
+     * @return  user name
+     */
+    public String getCurrentUserName()
+    {
+        if (username == null)
+        {
+            return AuthenticationUtil.getCurrentUserName();
+        }
+        return username;
+    }
+    
+    public void setCurrentUserName(String username)
+    {
+        this.username = username;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.util.AbstractLifecycleBean#onBootstrap(org.springframework.context.ApplicationEvent)
+     */
+    @Override
+    protected void onBootstrap(ApplicationEvent event)
+    {
+        // NOOP
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.util.AbstractLifecycleBean#onShutdown(org.springframework.context.ApplicationEvent)
+     */
+    @Override
+    protected void onShutdown(ApplicationEvent event)
+    {
+        // NOOP
+    }
+}