/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2009 Sun Microsystems, Inc.
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* Portions Copyright 2011-2013 ForgeRock AS
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*/
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package org.opends.server.replication.server.changelog.je;
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import org.opends.messages.Message;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.replication.server.changelog.api.*;
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import org.opends.server.replication.server.changelog.je.DraftCNDB.*;
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import org.opends.server.types.DebugLogLevel;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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/**
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* This class allows to iterate through the changes received from a given
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* LDAP Server Identifier.
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*/
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public class DraftCNDbIterator implements ChangeNumberIndexDBCursor
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{
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private static final DebugTracer TRACER = getTracer();
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private DraftCNDBCursor draftCNDbCursor;
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/**
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* Creates a new ReplicationIterator. All created iterator must be released by
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* the caller using the {@link #close()} method.
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*
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* @param db
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* The db where the iterator must be created.
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* @param startChangeNumber
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* The change number after which the iterator must start.
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* @throws ChangelogException
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* If a database problem happened.
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*/
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public DraftCNDbIterator(DraftCNDB db, long startChangeNumber)
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throws ChangelogException
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{
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draftCNDbCursor = db.openReadCursor(startChangeNumber);
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if (draftCNDbCursor == null)
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{
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throw new ChangelogException(Message.raw("no new change"));
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}
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}
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/** {@inheritDoc} */
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@Override
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public CNIndexRecord getRecord()
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{
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try
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{
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return this.draftCNDbCursor.currentRecord();
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}
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catch (Exception e)
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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return null;
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}
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}
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/** {@inheritDoc} */
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@Override
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public boolean next() throws ChangelogException
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{
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if (draftCNDbCursor != null)
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{
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return draftCNDbCursor.next();
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}
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return false;
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}
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/** {@inheritDoc} */
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@Override
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public void close()
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{
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synchronized (this)
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{
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if (draftCNDbCursor != null)
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{
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draftCNDbCursor.close();
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draftCNDbCursor = null;
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}
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}
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}
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/**
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* Called by the Gc when the object is garbage collected
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* Release the cursor in case the iterator was badly used and releaseCursor
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* was never called.
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*/
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@Override
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protected void finalize()
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{
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close();
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}
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}
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