/* * Copyright (c) 2008-2014 MongoDB, 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.mongodb.connection; import com.mongodb.MongoInternalException; import com.mongodb.ServerAddress; import com.mongodb.async.SingleResultCallback; abstract class ResponseCallback implements SingleResultCallback<ResponseBuffers> { private volatile boolean closed; private final ServerAddress serverAddress; private final long requestId; ResponseCallback(final long requestId, final ServerAddress serverAddress) { this.serverAddress = serverAddress; this.requestId = requestId; } protected ServerAddress getServerAddress() { return serverAddress; } protected long getRequestId() { return requestId; } @Override public void onResult(final ResponseBuffers responseBuffers, final Throwable t) { if (closed) { throw new MongoInternalException("Callback should not be invoked more than once", null); } closed = true; if (responseBuffers != null) { callCallback(responseBuffers, t); } else { callCallback(null, t); } } protected abstract void callCallback(ResponseBuffers responseBuffers, Throwable t); }