Sample change log consumer

changeLog.consumer.printTest.class = edu.internet2.middleware.grouper.changeLog.consumer.PrintTest
changeLog.consumer.printTest.quartzCron = 

GrouperSession grouperSession = GrouperSession.startRootSession();
Group group = new GroupSave(grouperSession).assignName("test:testGroup").assignCreateParentStemsIfNotExist(true).save();
addMember("test:testGroup", "GrouperSystem");
delMember("test:testGroup", "GrouperSystem");

Change log entry: stem -> addStem, null
Change log entry: privilege -> addPrivilege, null
Group add, name: test:testGroup
Change log entry: member -> addMember, null
Change log entry: privilege -> addPrivilege, null
Change log entry: privilege -> addPrivilege, null
Change log entry: privilege -> addPrivilege, null
Change log entry: membership -> addMembership, null
Change log entry: membership -> deleteMembership, null

/**
 * Copyright 2014 Internet2
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * @author mchyzer
 * $Id: PrintTest.java,v 1.1 2009-06-10 05:31:35 mchyzer Exp $
 */
package edu.internet2.middleware.grouper.changeLog.consumer;
import java.util.List;
import edu.internet2.middleware.grouper.changeLog.ChangeLogConsumerBase;
import edu.internet2.middleware.grouper.changeLog.ChangeLogEntry;
import edu.internet2.middleware.grouper.changeLog.ChangeLogLabels;
import edu.internet2.middleware.grouper.changeLog.ChangeLogProcessorMetadata;
import edu.internet2.middleware.grouper.changeLog.ChangeLogTypeBuiltin;

/**
 * just print out some of the events
 */
public class PrintTest extends ChangeLogConsumerBase {
  /**
   * @see edu.internet2.middleware.grouper.changeLog.ChangeLogConsumerBase#processChangeLogEntries(List, ChangeLogProcessorMetadata)
   */
  @Override
  public long processChangeLogEntries(List<ChangeLogEntry> changeLogEntryList,
      ChangeLogProcessorMetadata changeLogProcessorMetadata) {
    
    long currentId = -1;
    //try catch so we can track that we made some progress
    try {
      for (ChangeLogEntry changeLogEntry : changeLogEntryList) {
        currentId = changeLogEntry.getSequenceNumber();
        
        //if this is a group add action and category
        if (changeLogEntry.equalsCategoryAndAction(ChangeLogTypeBuiltin.GROUP_ADD)) {
          
          //print the name from the entry
          System.out.println("Group add, name: " 
              + changeLogEntry.retrieveValueForLabel(ChangeLogLabels.GROUP_ADD.name));
        } else if (changeLogEntry.equalsCategoryAndAction(ChangeLogTypeBuiltin.GROUP_DELETE)) {
          
          //print the name from the entry
          System.out.println("Group delete, name: " 
              + changeLogEntry.retrieveValueForLabel(ChangeLogLabels.GROUP_DELETE.name));
        } else if (changeLogEntry.equalsCategoryAndAction(ChangeLogTypeBuiltin.GROUP_UPDATE)) {
          
          //print the name from the entry
          System.out.println("Group update, name: " 
              + changeLogEntry.retrieveValueForLabel(ChangeLogLabels.GROUP_UPDATE.name)
              + ", property: " + changeLogEntry.retrieveValueForLabel(ChangeLogLabels.GROUP_UPDATE.propertyChanged)
              + ", from: '" + changeLogEntry.retrieveValueForLabel(ChangeLogLabels.GROUP_UPDATE.propertyOldValue)
              + "', to: '" + changeLogEntry.retrieveValueForLabel(ChangeLogLabels.GROUP_UPDATE.propertyNewValue) + "'");
        } else {
          System.out.println("Change log entry: " + changeLogEntry.getChangeLogType().getChangeLogCategory() +
              " -> " + changeLogEntry.getChangeLogType().getActionName() + ", " + changeLogEntry.getId());
        }
        
        //we successfully processed this record
      }
    } catch (Exception e) {
      changeLogProcessorMetadata.registerProblem(e, "Error processing record", currentId);
      //we made it to this -1
      return currentId-1;
    }
    if (currentId == -1) {
      throw new RuntimeException("Couldnt process any records");
    }
    
    return currentId;
  }
}