| /* |
| * 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.geode.cache.query.cq.internal.ops; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.apache.geode.InternalGemFireError; |
| import org.apache.geode.cache.client.ServerOperationException; |
| import org.apache.geode.cache.client.internal.AbstractOp; |
| import org.apache.geode.cache.client.internal.ConnectionStats; |
| import org.apache.geode.cache.client.internal.ExecutablePool; |
| import org.apache.geode.cache.query.cq.internal.ops.CreateCQOp.CreateCQOpImpl; |
| import org.apache.geode.internal.cache.tier.MessageType; |
| import org.apache.geode.internal.cache.tier.sockets.ChunkedMessage; |
| import org.apache.geode.internal.cache.tier.sockets.Message; |
| import org.apache.geode.internal.cache.tier.sockets.Part; |
| import org.apache.geode.internal.serialization.Version; |
| |
| /** |
| * Retrieves all durable cqs for a client from a server |
| * |
| * @since GemFire 7.0 |
| */ |
| public class GetDurableCQsOp { |
| /** |
| * Retrieves all durable continuous queries on the server using connections from the given pool to |
| * communicate with the server. |
| * |
| * @param pool the pool to use to communicate with the server. |
| */ |
| public static List<String> execute(ExecutablePool pool) { |
| AbstractOp op = new GetDurableCQsOpImpl(); |
| return (List<String>) pool.executeOnPrimary(op); |
| } |
| |
| private GetDurableCQsOp() { |
| // no instances allowed |
| } |
| |
| private static class GetDurableCQsOpImpl extends CreateCQOpImpl { |
| /** |
| * @throws org.apache.geode.SerializationException if serialization fails |
| */ |
| public GetDurableCQsOpImpl() { |
| super(MessageType.GETDURABLECQS_MSG_TYPE, 1 /* numparts */); |
| } |
| |
| @Override |
| protected String getOpName() { |
| return "getDurableCQs"; |
| } |
| |
| @Override |
| protected long startAttempt(ConnectionStats stats) { |
| return stats.startGetDurableCQs(); |
| } |
| |
| @Override |
| protected void endSendAttempt(ConnectionStats stats, long start) { |
| stats.endGetDurableCQsSend(start, hasFailed()); |
| } |
| |
| @Override |
| protected void endAttempt(ConnectionStats stats, long start) { |
| stats.endGetDurableCQs(start, hasTimedOut(), hasFailed()); |
| } |
| |
| @Override |
| protected Message createResponseMessage() { |
| return new ChunkedMessage(1, Version.CURRENT); |
| } |
| |
| @Override |
| protected Object processResponse(Message msg) throws Exception { |
| |
| ChunkedMessage getDurableCQsResponseMsg = (ChunkedMessage) msg; |
| final List<String> result = new LinkedList<String>(); |
| final Exception[] exceptionRef = new Exception[1]; |
| |
| getDurableCQsResponseMsg.readHeader(); |
| final int msgType = getDurableCQsResponseMsg.getMessageType(); |
| if (msgType == MessageType.RESPONSE) { |
| do { |
| getDurableCQsResponseMsg.receiveChunk(); |
| // callback.handle(msg); |
| Part part = getDurableCQsResponseMsg.getPart(0); |
| Object o = part.getObject(); |
| if (o instanceof Throwable) { |
| String s = "While performing a remote GetDurableCQs"; |
| exceptionRef[0] = new ServerOperationException(s, (Throwable) o); |
| } else { |
| result.addAll((List) o); |
| } |
| } while (!getDurableCQsResponseMsg.isLastChunk()); |
| } else { |
| if (msgType == MessageType.EXCEPTION) { |
| getDurableCQsResponseMsg.receiveChunk(); |
| Part part = msg.getPart(0); |
| String s = "While performing a remote GetDurableCQs"; |
| throw new ServerOperationException(s, (Throwable) part.getObject()); |
| // Get the exception toString part. |
| // This was added for c++ thin client and not used in java |
| // Part exceptionToStringPart = msg.getPart(1); |
| } else if (isErrorResponse(msgType)) { |
| getDurableCQsResponseMsg.receiveChunk(); |
| Part part = msg.getPart(0); |
| throw new ServerOperationException(part.getString()); |
| } else { |
| throw new InternalGemFireError( |
| "Unexpected message type " + MessageType.getString(msgType)); |
| } |
| } |
| |
| if (exceptionRef[0] != null) { |
| throw exceptionRef[0]; |
| } else { |
| return result; |
| } |
| } |
| |
| @Override |
| protected boolean isErrorResponse(int msgType) { |
| return msgType == MessageType.GET_DURABLE_CQS_DATA_ERROR; |
| } |
| } |
| } |