SEARCH-2028: New Web Script service to provide the next transaction commit time from a given time commit. (#508)

This feature will be used by SOLR MetadataTracker to improve performance.

pom.xml

@@ -37,7 +37,7 @@
         <dir.root>${project.build.directory}/alf_data</dir.root>
         <img.exe>convert</img.exe>
 
-        <dependency.alfresco-repository.version>8.86</dependency.alfresco-repository.version>
+        <dependency.alfresco-repository.version>8.89</dependency.alfresco-repository.version>
         <dependency.alfresco-data-model.version>8.85</dependency.alfresco-data-model.version>
         <dependency.alfresco-core.version>8.20</dependency.alfresco-core.version>
 

src/main/java/org/alfresco/repo/web/scripts/solr/NextTransactionGet.java

@@ -0,0 +1,66 @@
+/*
+ * #%L
+ * Alfresco Repository
+ * %%
+ * Copyright (C) 2005 - 2019 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software. 
+ * If the software was purchased under a paid Alfresco license, the terms of 
+ * the paid license agreement will prevail.  Otherwise, the software is 
+ * provided under the following open source license terms:
+ * 
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Alfresco 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 Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
+package org.alfresco.repo.web.scripts.solr;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.alfresco.repo.domain.node.ibatis.NodeDAOImpl;
+import org.springframework.extensions.webscripts.DeclarativeWebScript;
+import org.springframework.extensions.webscripts.Status;
+import org.springframework.extensions.webscripts.WebScriptRequest;
+
+/**
+ * Returns the next transaction commit time from a given commit time.
+ * This webscript is used to skip long periods where the repository is not ingesting new content. 
+ *  
+ * @author aborroy
+ *
+ */
+public class NextTransactionGet  extends DeclarativeWebScript
+{
+    
+    private NodeDAOImpl nodeDAO;
+
+    /* (non-Javadoc)
+     * @see org.alfresco.web.scripts.DeclarativeWebScript#executeImpl(org.alfresco.web.scripts.WebScriptRequest, org.alfresco.web.scripts.WebScriptResponse)
+     */
+    @Override
+    protected Map<String, Object> executeImpl(WebScriptRequest req, Status status)
+    {
+        Long fromCommitTime = Long.parseLong(req.getParameter("fromCommitTime"));
+        
+        Map<String, Object> model = new HashMap<>();
+        model.put("nextTransactionCommitTimeMs", nodeDAO.getNextTxCommitTime(fromCommitTime));
+        return model;
+    }
+    
+    public void setNodeDAO(NodeDAOImpl nodeDAO)
+    {
+        this.nodeDAO = nodeDAO;
+    }
+
+}

src/main/resources/alfresco/templates/webscripts/org/alfresco/repository/solr/nextTransactionCommitTime.get.desc.xml

@@ -0,0 +1,14 @@
+<webscript>
+	<shortname>Get the next transaction commit time from a given transaction commit time</shortname>
+	<description>
+	    Get the next transaction commit time from a given transaction commit time [fromCommitTime]
+	    If no new transaction exists, -1 is returned.
+	</description>
+	<url>/api/solr/nextTransaction?fromCommitTime={fromCommitTime}</url>
+	<format default="json">argument</format>
+	<!-- Solr api is protected by a solr-specific authentication mechanism -->
+	<authentication>none</authentication>
+	<transaction allow="readonly">required</transaction>
+	<lifecycle>internal</lifecycle>
+	<family>SOLR</family>
+</webscript>

src/main/resources/alfresco/templates/webscripts/org/alfresco/repository/solr/nextTransactionCommitTime.get.json.ftl

@@ -0,0 +1,3 @@
+{
+    "nextTransactionCommitTimeMs": <#if nextTransactionCommitTimeMs??>${nextTransactionCommitTimeMs?c}<#else>-1</#if>
+}

src/main/resources/alfresco/web-scripts-application-context.xml

@@ -1267,6 +1267,13 @@
 		<property name="nodeDAO" ref="nodeDAO" />
 	</bean>
 	
+	<!-- /api/solr webscript returning the min txId in a nodeId range -->
+	<bean id="webscript.org.alfresco.repository.solr.nextTransactionCommitTime.get"
+		class="org.alfresco.repo.web.scripts.solr.NextTransactionGet"
+		parent="webscript">
+		<property name="nodeDAO" ref="nodeDAO" />
+	</bean>	
+   
    <!--                                                                                                       -->
    <!-- Node Locator                                                                                          -->
    <!--                                                                                                       -->