/*
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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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* Portions Copyright 2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.replication.server;
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import static org.opends.server.loggers.debug.DebugLogger.debugEnabled;
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import static org.opends.server.loggers.debug.DebugLogger.getTracer;
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import static org.opends.server.util.StaticUtils.stackTraceToSingleLineString;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.LinkedHashSet;
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import org.opends.server.admin.std.server.MonitorProviderCfg;
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import org.opends.server.api.MonitorProvider;
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import org.opends.server.config.ConfigException;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.replication.common.ServerState;
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import org.opends.server.types.Attribute;
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import org.opends.server.types.AttributeType;
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import org.opends.server.types.AttributeValue;
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import org.opends.server.types.DN;
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import org.opends.server.types.InitializationException;
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/**
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* This class defines a server handler dedicated to the remote LDAP servers
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* connected to a remote Replication Server.
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* This class is necessary because we want to provide monitor entries for them
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* and because the monitor API only allows one entry by MonitorProvider instance
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* so that no other class can provide the monitor entry for these objects.
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*
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* One instance of this class is created for each instance of remote LDAP server
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* connected to a remote Replication Server.
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*/
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public class LightweightServerHandler
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extends MonitorProvider<MonitorProviderCfg>
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{
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// The tracer object for the debug logger.
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private static final DebugTracer TRACER = getTracer();
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short serverId;
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ServerHandler replServerHandler;
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ReplicationServerDomain rsDomain;
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DN baseDn;
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/**
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* Creates a new LighweightServerHandler with the provided serverid, connected
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* to the remote Replication Server represented by replServerHandler.
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*
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* @param serverId The serverId of this remote LDAP server.
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* @param replServerHandler The server handler of the Replication Server to
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* which this LDAP server is remotely connected.
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*/
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public LightweightServerHandler(String serverId,
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ServerHandler replServerHandler)
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{
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super("Server Handler");
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this.serverId = Short.valueOf(serverId);
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this.replServerHandler = replServerHandler;
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this.rsDomain = replServerHandler.getDomain();
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this.baseDn = rsDomain.getBaseDn();
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if (debugEnabled())
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TRACER.debugInfo(
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"In " +
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replServerHandler.getDomain().getReplicationServer().getMonitorInstanceName()+
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" LWSH for remote server " + this.serverId +
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" connected to:" + this.replServerHandler.getMonitorInstanceName() +
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" ()");
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}
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/**
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* Get the serverID associated with this LDAP server.
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* @return The serverId.
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*/
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public short getServerId()
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{
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return Short.valueOf(serverId);
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}
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/**
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* Stop this server handler processing.
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*/
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public void startHandler()
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{
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if (debugEnabled())
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TRACER.debugInfo(
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"In " +
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replServerHandler.getDomain().getReplicationServer().getMonitorInstanceName() +
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" LWSH for remote server " + this.serverId +
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" connected to:" + this.replServerHandler.getMonitorInstanceName() +
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" start");
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DirectoryServer.deregisterMonitorProvider(getMonitorInstanceName());
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DirectoryServer.registerMonitorProvider(this);
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}
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/**
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* Stop this server handler processing.
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*/
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public void stopHandler()
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{
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if (debugEnabled())
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TRACER.debugInfo(
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"In " +
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replServerHandler.getDomain().getReplicationServer().getMonitorInstanceName() +
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" LWSH for remote server " + this.serverId +
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" connected to:" + this.replServerHandler.getMonitorInstanceName() +
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" stop");
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DirectoryServer.deregisterMonitorProvider(getMonitorInstanceName());
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void initializeMonitorProvider(MonitorProviderCfg configuration)
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throws ConfigException,InitializationException
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{
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// Nothing to do for now
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}
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/**
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* Retrieves the name of this monitor provider. It should be unique among all
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* monitor providers, including all instances of the same monitor provider.
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*
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* @return The name of this monitor provider.
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*/
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@Override
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public String getMonitorInstanceName()
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{
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String serverURL=""; // FIXME
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String str = baseDn.toString() + " " + serverURL + " "
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+ String.valueOf(serverId);
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return "Undirect LDAP Server " + str;
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}
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/**
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* Retrieves the length of time in milliseconds that should elapse between
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* calls to the <CODE>updateMonitorData()</CODE> method. A negative or zero
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* return value indicates that the <CODE>updateMonitorData()</CODE> method
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* should not be periodically invoked.
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*
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* @return The length of time in milliseconds that should elapse between
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* calls to the <CODE>updateMonitorData()</CODE> method.
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*/
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@Override
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public long getUpdateInterval()
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{
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/* we don't wont to do polling on this monitor */
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return 0;
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}
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/**
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* Performs any processing periodic processing that may be desired to update
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* the information associated with this monitor. Note that best-effort
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* attempts will be made to ensure that calls to this method come
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* <CODE>getUpdateInterval()</CODE> milliseconds apart, but no guarantees will
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* be made.
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*/
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@Override
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public void updateMonitorData()
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{
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// As long as getUpdateInterval() returns 0, this will never get called
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}
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/**
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* Retrieves a set of attributes containing monitor data that should be
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* returned to the client if the corresponding monitor entry is requested.
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*
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* @return A set of attributes containing monitor data that should be
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* returned to the client if the corresponding monitor entry is
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* requested.
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*/
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@Override
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public ArrayList<Attribute> getMonitorData()
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{
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if (debugEnabled())
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TRACER.debugInfo(
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"In " +
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this.replServerHandler.getDomain().getReplicationServer().
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getMonitorInstanceName()+
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" LWSH for remote server " + this.serverId +
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" connected to:" + this.replServerHandler.getMonitorInstanceName() +
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" getMonitor data");
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ArrayList<Attribute> attributes = new ArrayList<Attribute>();
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attributes.add(new Attribute("server-id",
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String.valueOf(serverId)));
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attributes.add(new Attribute("base-dn",
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rsDomain.getBaseDn().toNormalizedString()));
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attributes.add(new Attribute("connected-to",
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replServerHandler.getMonitorInstanceName()));
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// Retrieves the topology counters
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try
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{
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rsDomain.retrievesRemoteMonitorData();
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// Compute the latency for the current SH
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ServerState remoteState = rsDomain.getServerState(serverId);
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if (remoteState == null)
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{
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remoteState = new ServerState();
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}
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/* get the Server State */
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final String ATTR_SERVER_STATE = "server-state";
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AttributeType type =
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DirectoryServer.getDefaultAttributeType(ATTR_SERVER_STATE);
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LinkedHashSet<AttributeValue> values =
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new LinkedHashSet<AttributeValue>();
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for (String str : remoteState.toStringSet())
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{
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values.add(new AttributeValue(type,str));
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}
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Attribute attr = new Attribute(type, ATTR_SERVER_STATE, values);
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attributes.add(attr);
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// add the latency attribute to our monitor data
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// Compute the latency for the current SH
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int missingChanges = rsDomain.getMissingChanges(remoteState);
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attributes.add(new Attribute("missing-changes",
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String.valueOf(missingChanges)));
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// Add the oldest missing update
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Long olderUpdateTime = rsDomain.getApproxFirstMissingDate(serverId);
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if (olderUpdateTime != null)
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{
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Date date = new Date(olderUpdateTime);
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attributes.add(new Attribute("approx-older-change-not-synchronized",
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date.toString()));
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attributes.add(
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new Attribute("approx-older-change-not-synchronized-millis",
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String.valueOf(olderUpdateTime)));
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}
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}
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catch(Exception e)
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{
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// We failed retrieving the remote monitor data.
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attributes.add(new Attribute("error",
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stackTraceToSingleLineString(e)));
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}
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return attributes;
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}
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}
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