001/* 002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Delbosc Benoit 018 */ 019package org.nuxeo.ecm.core.redis.contribs; 020 021import org.apache.commons.codec.binary.Base64; 022import org.nuxeo.ecm.core.storage.sql.Invalidations; 023 024import java.io.ByteArrayInputStream; 025import java.io.ByteArrayOutputStream; 026import java.io.IOException; 027import java.io.InputStream; 028import java.io.ObjectInputStream; 029import java.io.ObjectOutputStream; 030 031/** 032 * invalidations and nodeId serializer/unserializer. 033 * 034 * @since 7.4 035 */ 036public class RedisInvalidations { 037 private String nodeId; 038 private Invalidations invalidations; 039 040 public RedisInvalidations(String nodeId, Invalidations invals) { 041 assert nodeId != null : "nodeId required"; 042 assert invals != null : "invals required"; 043 this.nodeId = nodeId; 044 this.invalidations = invals; 045 } 046 047 public RedisInvalidations(String receiverNodeId, String message) { 048 assert receiverNodeId != null : "receiverNodeId required"; 049 if (message == null || !message.contains(":")) { 050 throw new IllegalArgumentException("Invalid message: " + message); 051 } 052 String[] parts = message.split(":", 2); 053 nodeId = parts[0]; 054 if (!receiverNodeId.equals(nodeId)) { 055 // only decode if it is a remote node 056 invalidations = deserializeInvalidations(parts[1]); 057 } 058 } 059 060 private Invalidations deserializeInvalidations(String invalsStr) { 061 InputStream bain = new ByteArrayInputStream(Base64.decodeBase64(invalsStr)); 062 try (ObjectInputStream in = new ObjectInputStream(bain)) { 063 return (Invalidations) in.readObject(); 064 } catch (IOException | ClassNotFoundException cause) { 065 throw new IllegalArgumentException("Cannot deserialize invalidations", cause); 066 } 067 } 068 069 public Invalidations getInvalidations() { 070 return invalidations; 071 } 072 073 public String serialize() throws IOException { 074 return nodeId + ":" + serializeInvalidations(invalidations); 075 } 076 077 private String serializeInvalidations(Invalidations invals) throws IOException { 078 ByteArrayOutputStream baout = new ByteArrayOutputStream(); 079 ObjectOutputStream out = new ObjectOutputStream(baout); 080 out.writeObject(invals); 081 out.flush(); 082 out.close(); 083 // use base64 because Jedis don't have onMessage with bytes 084 return Base64.encodeBase64String(baout.toByteArray()); 085 } 086 087 @Override 088 public String toString() { 089 if (invalidations == null) { 090 return "RedisInvalidationsInvalidations(local, discarded)"; 091 } 092 return "RedisInvalidationsInvalidations(fromNode=" + nodeId + ", " + invalidations.toString() + ")"; 093 } 094 095}