| /* |
| * 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.lucene.replicator.http; |
| |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.concurrent.Callable; |
| |
| import org.apache.http.HttpResponse; |
| import org.apache.http.conn.HttpClientConnectionManager; |
| import org.apache.lucene.replicator.Replicator; |
| import org.apache.lucene.replicator.Revision; |
| import org.apache.lucene.replicator.SessionToken; |
| import org.apache.lucene.replicator.http.ReplicationService.ReplicationAction; |
| |
| /** |
| * An HTTP implementation of {@link Replicator}. Assumes the API supported by |
| * {@link ReplicationService}. |
| * |
| * @lucene.experimental |
| */ |
| public class HttpReplicator extends HttpClientBase implements Replicator { |
| |
| /** Construct with specified connection manager. */ |
| public HttpReplicator(String host, int port, String path, HttpClientConnectionManager conMgr) { |
| super(host, port, path, conMgr, null); |
| } |
| |
| @Override |
| public SessionToken checkForUpdate(String currVersion) throws IOException { |
| String[] params = null; |
| if (currVersion != null) { |
| params = new String[] { ReplicationService.REPLICATE_VERSION_PARAM, currVersion }; |
| } |
| final HttpResponse response = executeGET(ReplicationAction.UPDATE.name(), params); |
| return doAction(response, new Callable<SessionToken>() { |
| @Override |
| public SessionToken call() throws Exception { |
| final DataInputStream dis = new DataInputStream(responseInputStream(response)); |
| try { |
| if (dis.readByte() == 0) { |
| return null; |
| } else { |
| return new SessionToken(dis); |
| } |
| } finally { |
| dis.close(); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| public InputStream obtainFile(String sessionID, String source, String fileName) throws IOException { |
| String[] params = new String[] { |
| ReplicationService.REPLICATE_SESSION_ID_PARAM, sessionID, |
| ReplicationService.REPLICATE_SOURCE_PARAM, source, |
| ReplicationService.REPLICATE_FILENAME_PARAM, fileName, |
| }; |
| final HttpResponse response = executeGET(ReplicationAction.OBTAIN.name(), params); |
| return doAction(response, false, new Callable<InputStream>() { |
| @Override |
| public InputStream call() throws Exception { |
| return responseInputStream(response, true); |
| } |
| }); |
| } |
| |
| @Override |
| public void publish(Revision revision) throws IOException { |
| throw new UnsupportedOperationException( |
| "this replicator implementation does not support remote publishing of revisions"); |
| } |
| |
| @Override |
| public void release(String sessionID) throws IOException { |
| String[] params = new String[] { |
| ReplicationService.REPLICATE_SESSION_ID_PARAM, sessionID |
| }; |
| final HttpResponse response = executeGET(ReplicationAction.RELEASE.name(), params); |
| doAction(response, new Callable<Object>() { |
| @Override |
| public Object call() throws Exception { |
| return null; // do not remove this call: as it is still validating for us! |
| } |
| }); |
| } |
| |
| } |