org.apache.cassandra.transport.messages.PrepareMessage Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.transport.messages;
import java.util.UUID;
import com.google.common.collect.ImmutableMap;
import io.netty.buffer.ByteBuf;
import org.apache.cassandra.service.ClientState;
import org.apache.cassandra.service.QueryState;
import org.apache.cassandra.tracing.Tracing;
import org.apache.cassandra.transport.*;
import org.apache.cassandra.utils.JVMStabilityInspector;
import org.apache.cassandra.utils.UUIDGen;
public class PrepareMessage extends Message.Request
{
public static final Message.Codec codec = new Message.Codec()
{
public PrepareMessage decode(ByteBuf body, ProtocolVersion version)
{
String query = CBUtil.readLongString(body);
return new PrepareMessage(query);
}
public void encode(PrepareMessage msg, ByteBuf dest, ProtocolVersion version)
{
CBUtil.writeLongString(msg.query, dest);
}
public int encodedSize(PrepareMessage msg, ProtocolVersion version)
{
return CBUtil.sizeOfLongString(msg.query);
}
};
private final String query;
public PrepareMessage(String query)
{
super(Message.Type.PREPARE);
this.query = query;
}
public Message.Response execute(QueryState state, long queryStartNanoTime)
{
try
{
UUID tracingId = null;
if (isTracingRequested())
{
tracingId = UUIDGen.getTimeUUID();
state.prepareTracingSession(tracingId);
}
if (state.traceNextQuery())
{
state.createTracingSession(getCustomPayload());
Tracing.instance.begin("Preparing CQL3 query", state.getClientAddress(), ImmutableMap.of("query", query));
}
Message.Response response = ClientState.getCQLQueryHandler().prepare(query, state, getCustomPayload());
if (tracingId != null)
response.setTracingId(tracingId);
return response;
}
catch (Exception e)
{
JVMStabilityInspector.inspectThrowable(e);
return ErrorMessage.fromException(e);
}
finally
{
Tracing.instance.stopSession();
}
}
@Override
public String toString()
{
return "PREPARE " + query;
}
}