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Apache Geode (incubating) provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
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/*
* 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 com.gemstone.gemfire.cache;
/**
* Gemfire Context passed to PartitionResolver
to compute the
* data location
*
* @author Yogesh Mahajan
* @author Mitch Thomas
*
* @see PartitionResolver
* @since 6.0
*/
public interface EntryOperation {
/**
* Returns the region to which this cached object belongs or
* the region that raised this event for RegionEvent
s.
* @return the region associated with this object or the region that raised
* this event.
*/
public Region getRegion();
/**
* Return a description of the operation that triggered this event.
* It may return null and should not be used to generate routing object
* in {@link PartitionResolver#getRoutingObject(EntryOperation)}
* @return the operation that triggered this event.
* @since 6.0
* @deprecated
*/
public Operation getOperation();
/**
* Returns the key.
* @return the key
*/
public K getKey();
/** Returns the callbackArgument passed to the method that generated this event.
* Provided primarily in case this object or region has already been
* destroyed. See the {@link Region} interface methods that take a
* callbackArgument parameter.
* Only fields on the key should be used when creating the routing object.
* @return the callbackArgument associated with this event. null
* is returned if the callback argument is not propagated to the event.
* This happens for events given to {@link TransactionListener}
* and to {@link CacheListener} on the remote side of a transaction commit.
*/
public Object getCallbackArgument();
/**
* Returns true
if the callback argument is "available".
* Not available means that the callback argument may have existed but it could
* not be obtained.
* Note that {@link #getCallbackArgument} will return null
* when this method returns false
.
* @since 6.0
*/
public boolean isCallbackArgumentAvailable();
/**
* Returns the value but may return null and should not be used to generate
* routing object in {@link PartitionResolver#getRoutingObject(EntryOperation)}.
* Only fields on the key should be used when creating the routing object.
* @return the value.
* @deprecated
*/
public V getNewValue();
}
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