/*
* 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.cassandra.tracing;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import com.google.common.base.Stopwatch;
import org.slf4j.Logger;
import org.slf4j.helpers.MessageFormatter;
import org.apache.cassandra.concurrent.Stage;
import org.apache.cassandra.concurrent.StageManager;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.db.ColumnFamily;
import org.apache.cassandra.db.ConsistencyLevel;
import org.apache.cassandra.db.RowMutation;
import org.apache.cassandra.service.StorageProxy;
import org.apache.cassandra.utils.*;
/**
* ThreadLocal state for a tracing session. The presence of an instance of this class as a ThreadLocal denotes that an
* operation is being traced.
*/
public class TraceState
{
public final UUID sessionId;
public final InetAddress coordinator;
public final Stopwatch watch;
public final ByteBuffer sessionIdBytes;
public final boolean isLocallyOwned;
public TraceState(InetAddress coordinator, UUID sessionId, boolean locallyOwned)
{
assert coordinator != null;
assert sessionId != null;
this.coordinator = coordinator;
this.sessionId = sessionId;
this.isLocallyOwned = locallyOwned;
sessionIdBytes = ByteBufferUtil.bytes(sessionId);
watch = new Stopwatch();
watch.start();
}
public int elapsed()
{
long elapsed = watch.elapsedTime(TimeUnit.MICROSECONDS);
return elapsed < Integer.MAX_VALUE ? (int) elapsed : Integer.MAX_VALUE;
}
public void trace(String format, Object arg)
{
trace(MessageFormatter.format(format, arg).getMessage());
}
public void trace(String format, Object arg1, Object arg2)
{
trace(MessageFormatter.format(format, arg1, arg2).getMessage());
}
public void trace(String format, Object[] args)
{
trace(MessageFormatter.arrayFormat(format, args).getMessage());
}
public void trace(final String message)
{
final int elapsed = elapsed();
final ByteBuffer eventId = ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes());
final String threadName = Thread.currentThread().getName();
StageManager.getStage(Stage.TRACING).execute(new WrappedRunnable()
{
public void runMayThrow() throws Exception
{
CFMetaData cfMeta = CFMetaData.TraceEventsCf;
ColumnFamily cf = ColumnFamily.create(cfMeta);
Tracing.addColumn(cf, Tracing.buildName(cfMeta, eventId, ByteBufferUtil.bytes("source")), FBUtilities.getBroadcastAddress());
Tracing.addColumn(cf, Tracing.buildName(cfMeta, eventId, ByteBufferUtil.bytes("thread")), threadName);
Tracing.addColumn(cf, Tracing.buildName(cfMeta, eventId, ByteBufferUtil.bytes("source_elapsed")), elapsed);
Tracing.addColumn(cf, Tracing.buildName(cfMeta, eventId, ByteBufferUtil.bytes("activity")), message);
RowMutation mutation = new RowMutation(Tracing.TRACE_KS, sessionIdBytes);
mutation.add(cf);
StorageProxy.mutate(Arrays.asList(mutation), ConsistencyLevel.ANY);
}
});
}
}