/*
* Copyright (C) 2012-2015 DataStax Inc.
*
* 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.
*/
package com.datastax.driver.osgi.impl;
import com.datastax.driver.core.*;
import com.datastax.driver.core.exceptions.InvalidQueryException;
import com.datastax.driver.core.policies.PercentileSpeculativeExecutionPolicy;
import com.datastax.driver.extras.codecs.date.SimpleTimestampCodec;
import com.datastax.driver.osgi.api.MailboxService;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Hashtable;
import static com.datastax.driver.core.ProtocolOptions.Compression.LZ4;
import static com.datastax.driver.osgi.api.MailboxMessage.TABLE;
public class Activator implements BundleActivator {
private static final Logger LOGGER = LoggerFactory.getLogger(Activator.class);
private Cluster cluster;
@Override
public void start(BundleContext context) throws Exception {
VersionNumber ver = VersionNumber.parse(context.getProperty("cassandra.version"));
LOGGER.info("C* version: {}", ver);
String contactPointsStr = context.getProperty("cassandra.contactpoints");
if (contactPointsStr == null) {
contactPointsStr = "127.0.0.1";
}
LOGGER.info("Contact points: {}", contactPointsStr);
String[] contactPoints = contactPointsStr.split(",");
String keyspace = context.getProperty("cassandra.keyspace");
if (keyspace == null) {
keyspace = "mailbox";
}
LOGGER.info("Keyspace: {}", keyspace);
keyspace = Metadata.quote(keyspace);
Cluster.Builder builder = Cluster.builder()
.addContactPoints(contactPoints)
.withCodecRegistry(new CodecRegistry().register(SimpleTimestampCodec.instance));
String compression = context.getProperty("cassandra.compression");
if (compression != null) {
if (ver.getMajor() < 2 && compression.equals(LZ4.name())) {
LOGGER.warn("Requested LZ4 compression but C* version is not compatible, disabling");
} else {
LOGGER.info("Compression: {}", compression);
builder.withCompression(ProtocolOptions.Compression.valueOf(compression));
}
} else {
LOGGER.info("Compression: NONE");
}
String usePercentileSpeculativeExecutionPolicy = context.getProperty("cassandra.usePercentileSpeculativeExecutionPolicy");
if ("true".equals(usePercentileSpeculativeExecutionPolicy)) {
PerHostPercentileTracker perHostPercentileTracker = PerHostPercentileTracker.builder(15000).build();
builder.withSpeculativeExecutionPolicy(new PercentileSpeculativeExecutionPolicy(perHostPercentileTracker, 99, 1));
LOGGER.info("Use PercentileSpeculativeExecutionPolicy: YES");
} else {
LOGGER.info("Use PercentileSpeculativeExecutionPolicy: NO");
}
cluster = builder.build();
Session session;
try {
session = cluster.connect(keyspace);
} catch (InvalidQueryException e) {
// Create the schema if it does not exist.
session = cluster.connect();
session.execute("CREATE KEYSPACE " + keyspace +
" with replication = {'class': 'SimpleStrategy', 'replication_factor' : 1}");
session.execute("CREATE TABLE " + keyspace + "." + TABLE + " (" +
"recipient text," +
"time timestamp," +
"sender text," +
"body text," +
"PRIMARY KEY (recipient, time))");
session.execute("USE " + keyspace);
}
MailboxImpl mailbox = new MailboxImpl(session, keyspace);
mailbox.init();
context.registerService(MailboxService.class.getName(), mailbox, new Hashtable<String, String>());
LOGGER.info("Mailbox Service successfully initialized");
}
@Override
public void stop(BundleContext context) throws Exception {
if (cluster != null) {
cluster.close();
/*
Allow Netty ThreadDeathWatcher to terminate;
unfortunately we can't explicitly call ThreadDeathWatcher.awaitInactivity()
because Netty could be shaded.
If this thread isn't terminated when this bundle is closed,
we could get exceptions such as this one:
Exception in thread "threadDeathWatcher-2-1" java.lang.NoClassDefFoundError: xxx
Caused by: java.lang.ClassNotFoundException: Unable to load class 'xxx' because the bundle wiring for xxx is no longer valid.
Although ugly, they are harmless and can be safely ignored.
*/
Thread.sleep(1000);
}
}
}