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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.internal.cache.extension;
import java.util.ArrayList;
import org.apache.geode.cache.Cache;
import org.apache.geode.internal.util.CollectionUtils;
/**
* Simple implementation of {@link ExtensionPoint} for easy integration with existing objects.
*
*
* @since GemFire 8.1
*/
// UnitTest SimpleExtensionPointJUnitTest
public class SimpleExtensionPoint implements ExtensionPoint {
protected final ArrayList> extensions = new ArrayList>();
protected final Iterable> iterable =
CollectionUtils.unmodifiableIterable(extensions);
protected final Extensible extensible;
protected final T target;
/**
* Construct a new {@link SimpleExtensionPoint} around the given extensible target.
*
* @param extensible the {@link Extensible} object this extension point acts on.
*
* @param target the T
instance being extended. Likely the same as
* exensible
.
* @since GemFire 8.1
*/
public SimpleExtensionPoint(final Extensible extensible, final T target) {
this.extensible = extensible;
this.target = target;
}
@Override
public Iterable> getExtensions() {
return iterable;
}
@Override
public void addExtension(Extension extension) {
extensions.add(extension);
}
@Override
public void removeExtension(Extension extension) {
extensions.remove(extension);
}
@Override
public T getTarget() {
return target;
}
public void beforeCreate(final Cache cache) {
for (final Extension extension : extensions) {
extension.beforeCreate(extensible, cache);
}
}
public void fireCreate(final Extensible newTarget) {
for (final Extension extension : extensions) {
extension.onCreate(extensible, newTarget);
}
}
}