/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.ignite.spi.checkpoint.cache;
import javax.cache.CacheException;
import org.apache.ignite.IgniteLogger;
import org.apache.ignite.events.CacheEvent;
import org.apache.ignite.events.Event;
import org.apache.ignite.internal.managers.eventstorage.GridLocalEventListener;
import org.apache.ignite.internal.util.typedef.F;
import org.apache.ignite.internal.util.typedef.internal.S;
import org.apache.ignite.internal.util.typedef.internal.U;
import org.apache.ignite.resources.LoggerResource;
import org.apache.ignite.spi.IgniteSpiAdapter;
import org.apache.ignite.spi.IgniteSpiConfiguration;
import org.apache.ignite.spi.IgniteSpiContext;
import org.apache.ignite.spi.IgniteSpiException;
import org.apache.ignite.spi.IgniteSpiMBeanAdapter;
import org.apache.ignite.spi.IgniteSpiMultipleInstancesSupport;
import org.apache.ignite.spi.checkpoint.CheckpointListener;
import org.apache.ignite.spi.checkpoint.CheckpointSpi;
import org.jetbrains.annotations.Nullable;
import static org.apache.ignite.events.EventType.EVT_CACHE_OBJECT_EXPIRED;
import static org.apache.ignite.events.EventType.EVT_CACHE_OBJECT_REMOVED;
/**
* This class defines cache-based implementation for checkpoint SPI.
* <h1 class="header">Configuration</h1>
* <h2 class="header">Mandatory</h2>
* This SPI has no mandatory configuration parameters.
* <h2 class="header">Optional</h2>
* This SPI has following optional configuration parameters:
* <ul>
* <li>Cache name (see {@link #setCacheName(String)})</li>
* </ul>
* <h2 class="header">Java Example</h2>
* {@link CacheCheckpointSpi} can be configured as follows:
* <pre name="code" class="java">
* IgniteConfiguration cfg = new IgniteConfiguration();
*
* String cacheName = "checkpoints";
*
* GridCacheConfiguration cacheConfig = new GridCacheConfiguration();
*
* cacheConfig.setName(cacheName);
*
* GridCacheCheckpointSpi spi = new GridCacheCheckpointSpi();
*
* spi.setCacheName(cacheName);
*
* cfg.setCacheConfiguration(cacheConfig);
*
* // Override default checkpoint SPI.
* cfg.setCheckpointSpi(cpSpi);
*
* // Start grid.
* G.start(cfg);
* </pre>
* <h2 class="header">Spring Example</h2>
* {@link CacheCheckpointSpi} can be configured from Spring XML configuration file:
* <pre name="code" class="xml">
* <bean id="grid.custom.cfg" class="org.apache.ignite.configuration.IgniteConfiguration" singleton="true">
* ...
* <!-- Cache configuration. -->
* <property name="cacheConfiguration">
* <list>
* <bean class="org.apache.ignite.cache.CacheConfiguration">
* <property name="name" value="CACHE_NAME"/>
* </bean>
* </list>
* </property>
*
* <!-- SPI configuration. -->
* <property name="checkpointSpi">
* <bean class="org.apache.ignite.spi.checkpoint.cache.CacheCheckpointSpi">
* <property name="cacheName" value="CACHE_NAME"/>
* </bean>
* </property>
* ...
* </bean>
* </pre>
* <p>
* <img src="http://ignite.apache.org/images/spring-small.png">
* <br>
* For information about Spring framework visit <a href="http://www.springframework.org/">www.springframework.org</a>
* @see org.apache.ignite.spi.checkpoint.CheckpointSpi
*/
@IgniteSpiMultipleInstancesSupport(true)
public class CacheCheckpointSpi extends IgniteSpiAdapter implements CheckpointSpi {
/** Default cache name (value is <tt>checkpoints</tt>). */
public static final String DFLT_CACHE_NAME = "checkpoints";
/** Logger. */
@LoggerResource
private IgniteLogger log;
/** Cache name. */
private String cacheName = DFLT_CACHE_NAME;
/** Listener. */
private CheckpointListener lsnr;
/** Grid event listener. */
private GridLocalEventListener evtLsnr;
/**
* Sets cache name to be used by this SPI.
* <p>
* If cache name is not provided {@link #DFLT_CACHE_NAME} is used.
*
* @param cacheName Cache name.
* @return {@code this} for chaining.
*/
@IgniteSpiConfiguration(optional = true)
public CacheCheckpointSpi setCacheName(String cacheName) {
this.cacheName = cacheName;
return this;
}
/**
* Gets cache name to be used by this SPI..
*
* @return Cache name to be used by this SPI.
*/
public String getCacheName() {
return cacheName;
}
/** {@inheritDoc} */
@Override public void spiStart(@Nullable String igniteInstanceName) throws IgniteSpiException {
assertParameter(!F.isEmpty(cacheName), "!F.isEmpty(cacheName)");
// Start SPI start stopwatch.
startStopwatch();
// Ack ok start.
if (log.isDebugEnabled())
log.debug(configInfo("cacheName", cacheName));
registerMBean(igniteInstanceName, new CacheCheckpointSpiMBeanImpl(this), CacheCheckpointSpiMBean.class);
if (log.isDebugEnabled())
log.debug(startInfo());
}
/** {@inheritDoc} */
@Override protected void onContextInitialized0(IgniteSpiContext spiCtx) throws IgniteSpiException {
getSpiContext().addLocalEventListener(evtLsnr = new GridLocalEventListener() {
/** {@inheritDoc} */
@Override public void onEvent(Event evt) {
assert evt != null;
assert evt.type() == EVT_CACHE_OBJECT_REMOVED || evt.type() == EVT_CACHE_OBJECT_EXPIRED;
CacheEvent e = (CacheEvent)evt;
if (!F.eq(e.cacheName(), cacheName))
return;
if (e.oldValue() != null) {
CheckpointListener tmp = lsnr;
if (tmp != null)
tmp.onCheckpointRemoved((String)e.key());
}
}
}, EVT_CACHE_OBJECT_REMOVED, EVT_CACHE_OBJECT_EXPIRED);
}
/** {@inheritDoc} */
@Override public void spiStop() throws IgniteSpiException {
unregisterMBean();
// Ack ok stop.
if (log.isDebugEnabled())
log.debug(stopInfo());
}
/** {@inheritDoc} */
@Override protected void onContextDestroyed0() {
if (evtLsnr != null) {
IgniteSpiContext ctx = getSpiContext();
if (ctx != null)
ctx.removeLocalEventListener(evtLsnr);
}
}
/** {@inheritDoc} */
@Nullable @Override public byte[] loadCheckpoint(String key) throws IgniteSpiException {
assert key != null;
try {
return getSpiContext().get(cacheName, key);
}
catch (CacheException e) {
throw new IgniteSpiException("Failed to load checkpoint data [key=" + key + ']', e);
}
}
/** {@inheritDoc} */
@Override public boolean saveCheckpoint(String key, byte[] state, long timeout, boolean overwrite)
throws IgniteSpiException {
assert key != null;
assert timeout >= 0;
try {
if (overwrite) {
getSpiContext().put(cacheName, key, state, timeout);
return true;
}
else
return getSpiContext().putIfAbsent(cacheName, key, state, timeout) == null;
}
catch (CacheException e) {
throw new IgniteSpiException("Failed to save checkpoint data [key=" + key +
", stateSize=" + state.length + ", timeout=" + timeout + ']', e);
}
}
/** {@inheritDoc} */
@Override public boolean removeCheckpoint(String key) {
assert key != null;
try {
return getSpiContext().remove(cacheName, key) != null;
}
catch (CacheException e) {
U.error(log, "Failed to remove checkpoint data [key=" + key + ']', e);
return false;
}
}
/** {@inheritDoc} */
@Override public void setCheckpointListener(CheckpointListener lsnr) {
this.lsnr = lsnr;
}
/** {@inheritDoc} */
@Override public CacheCheckpointSpi setName(String name) {
super.setName(name);
return this;
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(CacheCheckpointSpi.class, this);
}
/**
* MBean implementation for CacheCheckpointSpi.
*/
private class CacheCheckpointSpiMBeanImpl extends IgniteSpiMBeanAdapter implements CacheCheckpointSpiMBean {
/** {@inheritDoc} */
CacheCheckpointSpiMBeanImpl(IgniteSpiAdapter spiAdapter) {
super(spiAdapter);
}
/** {@inheritDoc} */
@Override public String getCacheName() {
return CacheCheckpointSpi.this.getCacheName();
}
}
}