| /* |
| * 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.transport.messages; |
| |
| import java.util.UUID; |
| |
| import com.google.common.collect.ImmutableMap; |
| import io.netty.buffer.ByteBuf; |
| |
| import org.apache.cassandra.cql3.CQLStatement; |
| import org.apache.cassandra.cql3.QueryHandler; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.cql3.statements.ParsedStatement; |
| import org.apache.cassandra.exceptions.PreparedQueryNotFoundException; |
| 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.MD5Digest; |
| import org.apache.cassandra.utils.UUIDGen; |
| |
| public class ExecuteMessage extends Message.Request |
| { |
| public static final Message.Codec<ExecuteMessage> codec = new Message.Codec<ExecuteMessage>() |
| { |
| public ExecuteMessage decode(ByteBuf body, int version) |
| { |
| byte[] id = CBUtil.readBytes(body); |
| return new ExecuteMessage(MD5Digest.wrap(id), QueryOptions.codec.decode(body, version)); |
| } |
| |
| public void encode(ExecuteMessage msg, ByteBuf dest, int version) |
| { |
| CBUtil.writeBytes(msg.statementId.bytes, dest); |
| if (version == 1) |
| { |
| CBUtil.writeValueList(msg.options.getValues(), dest); |
| CBUtil.writeConsistencyLevel(msg.options.getConsistency(), dest); |
| } |
| else |
| { |
| QueryOptions.codec.encode(msg.options, dest, version); |
| } |
| } |
| |
| public int encodedSize(ExecuteMessage msg, int version) |
| { |
| int size = 0; |
| size += CBUtil.sizeOfBytes(msg.statementId.bytes); |
| if (version == 1) |
| { |
| size += CBUtil.sizeOfValueList(msg.options.getValues()); |
| size += CBUtil.sizeOfConsistencyLevel(msg.options.getConsistency()); |
| } |
| else |
| { |
| size += QueryOptions.codec.encodedSize(msg.options, version); |
| } |
| return size; |
| } |
| }; |
| |
| public final MD5Digest statementId; |
| public final QueryOptions options; |
| |
| public ExecuteMessage(MD5Digest statementId, QueryOptions options) |
| { |
| super(Message.Type.EXECUTE); |
| this.statementId = statementId; |
| this.options = options; |
| } |
| |
| public Message.Response execute(QueryState state) |
| { |
| try |
| { |
| QueryHandler handler = ClientState.getCQLQueryHandler(); |
| ParsedStatement.Prepared prepared = handler.getPrepared(statementId); |
| if (prepared == null) |
| throw new PreparedQueryNotFoundException(statementId); |
| |
| options.prepare(prepared.boundNames); |
| CQLStatement statement = prepared.statement; |
| |
| if (options.getPageSize() == 0) |
| throw new ProtocolException("The page size cannot be 0"); |
| |
| UUID tracingId = null; |
| if (isTracingRequested()) |
| { |
| tracingId = UUIDGen.getTimeUUID(); |
| state.prepareTracingSession(tracingId); |
| } |
| |
| if (state.traceNextQuery()) |
| { |
| state.createTracingSession(); |
| |
| ImmutableMap.Builder<String, String> builder = ImmutableMap.builder(); |
| if (options.getPageSize() > 0) |
| builder.put("page_size", Integer.toString(options.getPageSize())); |
| if(options.getConsistency() != null) |
| builder.put("consistency_level", options.getConsistency().name()); |
| if(options.getSerialConsistency() != null) |
| builder.put("serial_consistency_level", options.getSerialConsistency().name()); |
| |
| // TODO we don't have [typed] access to CQL bind variables here. CASSANDRA-4560 is open to add support. |
| Tracing.instance.begin("Execute CQL3 prepared query", state.getClientAddress(), builder.build()); |
| } |
| |
| // Some custom QueryHandlers are interested by the bound names. We provide them this information |
| // by wrapping the QueryOptions. |
| QueryOptions queryOptions = QueryOptions.addColumnSpecifications(options, prepared.boundNames); |
| Message.Response response = handler.processPrepared(statement, state, queryOptions, getCustomPayload()); |
| if (options.skipMetadata() && response instanceof ResultMessage.Rows) |
| ((ResultMessage.Rows)response).result.metadata.setSkipMetadata(); |
| |
| 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 "EXECUTE " + statementId + " with " + options.getValues().size() + " values at consistency " + options.getConsistency(); |
| } |
| } |