/*
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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 2008-2010 Sun Microsystems, Inc.
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*/
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package org.opends.server.monitors;
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import static org.opends.messages.ConfigMessages.*;
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import static org.opends.server.loggers.ErrorLogger.*;
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import java.util.ArrayList;
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import org.opends.messages.Message;
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import org.opends.server.admin.std.server.EntryCacheCfg;
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import org.opends.server.admin.std.server.EntryCacheMonitorProviderCfg;
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import org.opends.server.api.EntryCache;
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import org.opends.server.api.MonitorProvider;
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import org.opends.server.config.ConfigConstants;
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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.types.Attribute;
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/**
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* This class defines a Directory Server monitor provider that can be used to
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* obtain information about the entry cache state. Note that the information
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* reported is obtained with no locking, so it may not be entirely consistent.
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*/
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public class EntryCacheMonitorProvider
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extends MonitorProvider<EntryCacheMonitorProviderCfg>
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{
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// The name for this monitor.
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private String monitorName;
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// The entry cache common name.
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private String entryCacheName;
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// The entry cache with which this monitor is associated.
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private EntryCache<? extends EntryCacheCfg> entryCache;
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// Entry cache monitor configuration.
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private EntryCacheMonitorProviderCfg monitorConfiguration;
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/**
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* Creates default instance of this monitor provider.
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*/
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public EntryCacheMonitorProvider()
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{
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this.entryCacheName = "Entry Caches";
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this.entryCache = (EntryCache<?>) DirectoryServer.getEntryCache();
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}
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/**
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* Creates implementation specific instance of this monitor provider.
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*
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* @param entryCacheName The name to use for this monitor provider.
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* @param entryCache The entry cache to associate this monitor
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* provider with.
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*/
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public EntryCacheMonitorProvider(
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String entryCacheName,
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EntryCache<? extends EntryCacheCfg> entryCache)
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{
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this.entryCacheName = entryCacheName + " Entry Cache";
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this.entryCache = entryCache;
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}
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/**
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* {@inheritDoc}
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*/
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public void initializeMonitorProvider(
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EntryCacheMonitorProviderCfg configuration)
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throws ConfigException
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{
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monitorName = entryCacheName;
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if (configuration != null) {
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monitorConfiguration = configuration;
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}
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if (monitorConfiguration == null) {
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Message message =
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INFO_WARN_CONFIG_ENTRYCACHE_NO_MONITOR_CONFIG_ENTRY.get(
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ConfigConstants.DN_ENTRY_CACHE_MONITOR_CONFIG,
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monitorName);
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logError(message);
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throw new ConfigException(message);
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}
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if (!monitorConfiguration.isEnabled()) {
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Message message =
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INFO_WARN_CONFIG_ENTRYCACHE_MONITOR_CONFIG_DISABLED.get(
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ConfigConstants.DN_ENTRY_CACHE_MONITOR_CONFIG,
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monitorName);
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logError(message);
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throw new ConfigException(message);
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}
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}
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/**
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* {@inheritDoc}
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*/
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public String getMonitorInstanceName()
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{
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return monitorName;
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}
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/**
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* {@inheritDoc}
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*/
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public ArrayList<Attribute> getMonitorData()
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{
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ArrayList<Attribute> attrs = new ArrayList<Attribute>();
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if ((entryCache != null) &&
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(monitorConfiguration != null) &&
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(monitorConfiguration.isEnabled())) {
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// Get monitor data from the cache.
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attrs = entryCache.getMonitorData();
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}
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return attrs;
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}
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}
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