/*
* 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 org.apache.geode.DataSerializable;
import org.apache.geode.Instantiator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class implements delayed attribute delta propagation. Updates to attributes are only
* propagated once the session goes out of scope - i.e. as the request is done being processed.
*/
public class DeltaQueuedSessionAttributes extends AbstractDeltaSessionAttributes {
private static final Logger LOG =
LoggerFactory.getLogger(DeltaQueuedSessionAttributes.class.getName());
private Trigger trigger = Trigger.SET;
private enum Trigger {
SET, SET_AND_GET;
}
/**
* Register ourselves for de-serialization
*/
static {
Instantiator.register(new Instantiator(DeltaQueuedSessionAttributes.class, 3479) {
@Override
public DataSerializable newInstance() {
return new DeltaQueuedSessionAttributes();
}
});
}
/**
* Default constructor
*/
public DeltaQueuedSessionAttributes() {}
public void setReplicationTrigger(String trigger) {
this.trigger = Trigger.valueOf(trigger.toUpperCase());
}
@Override
public Object getAttribute(String attr) {
if (trigger == Trigger.SET_AND_GET) {
deltas.put(attr, new DeltaEvent(session, attr));
}
return super.getAttribute(attr);
}
/**
* {@inheritDoc} Put an attribute, setting the dirty flag. The changes are flushed at the end of
* filter processing.
*/
@Override
public Object putAttribute(String attr, Object value) {
Object obj = attributes.put(attr, value);
deltas.put(attr, new DeltaEvent(true, attr, value));
return obj;
}
/**
* {@inheritDoc} Remove an attribute, setting the dirty flag. The changes are flushed at the end
* of filter processing.
*/
@Override
public Object removeAttribute(String attr) {
Object obj = attributes.remove(attr);
deltas.put(attr, new DeltaEvent(false, attr, null));
return obj;
}
}