| /* |
| * 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.modules.session.internal.filter.attributes; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.geode.DataSerializable; |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.internal.util.BlobHelper; |
| import org.apache.geode.modules.session.internal.filter.GemfireHttpSession; |
| |
| /** |
| * Capture the update to a particular name |
| */ |
| public class DeltaEvent implements DataSerializable { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(DeltaEvent.class.getName()); |
| /** |
| * The event is either an update (true) or a remove (false) |
| */ |
| private boolean update; |
| |
| private String name; |
| |
| private Object value = null; |
| |
| private GemfireHttpSession session = null; |
| |
| /** |
| * Constructor for de-serialization only |
| */ |
| @SuppressWarnings("unused") |
| public DeltaEvent() {} |
| |
| /** |
| * Constructor which creates a 'deferred' event. This is used when the value should only be |
| * applied when the object is serialized. |
| * |
| * @param session the session from which the value ultimately will be retrieved |
| * @param attribute the name of the attribute |
| */ |
| DeltaEvent(GemfireHttpSession session, String attribute) { |
| this.session = session; |
| this.name = attribute; |
| this.update = true; |
| } |
| |
| DeltaEvent(boolean update, String attribute, Object value) { |
| this.update = update; |
| this.name = attribute; |
| this.value = value; |
| blobifyValue(); |
| } |
| |
| private void blobifyValue() { |
| if (value instanceof byte[]) { |
| // already blobified |
| return; |
| } |
| try { |
| value = BlobHelper.serializeToBlob(value); |
| } catch (IOException iox) { |
| LOG.error("Attribute '" + name + "' value: " + value |
| + " cannot be serialized due to the following exception", iox); |
| } |
| } |
| |
| public boolean isUpdate() { |
| return update; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public Object getValue() { |
| return value; |
| } |
| |
| @Override |
| public void toData(DataOutput out) throws IOException { |
| if (session != null) { |
| value = session.getAttribute(name); |
| blobifyValue(); |
| } |
| out.writeBoolean(update); |
| DataSerializer.writeString(name, out); |
| DataSerializer.writeObject(value, out); |
| } |
| |
| @Override |
| public void fromData(DataInput in) throws IOException, ClassNotFoundException { |
| update = in.readBoolean(); |
| name = DataSerializer.readString(in); |
| value = DataSerializer.readObject(in); |
| } |
| } |