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/*
* ============LICENSE_START=======================================================
* feature-server-pool
* ================================================================================
* Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.serverpool;
import java.io.PrintStream;
import java.util.IdentityHashMap;
import org.onap.policy.drools.serverpooltest.BucketWrapper;
import org.onap.policy.drools.serverpooltest.ServerWrapper;
/**
* This class implements the 'BucketWrapper' interface. There is one
* 'BucketWrapperImpl' class for each simulated host.
*/
public class BucketWrapperImpl implements BucketWrapper {
// this maps a 'Bucket' instance on this host to an associated wrapper
private static IdentityHashMap<Bucket, BucketWrapperImpl> bucketToWrapper =
new IdentityHashMap<>();
// this is the 'Bucket' instance associated with the wrapper
private Bucket bucket;
/**
* This method maps a 'Bucket' instance into a 'BucketWrapperImpl'
* instance. The goal is to have only a single 'BucketWrapperImpl' instance
* for each 'Bucket' instance, so that testing for identity will work
* as expected.
*
* @param bucket the 'Bucket' instance
* @return the associated 'BucketWrapperImpl' instance
*/
static synchronized BucketWrapperImpl getWrapper(Bucket bucket) {
if (bucket == null) {
return null;
}
BucketWrapperImpl rval = bucketToWrapper.get(bucket);
if (rval == null) {
// a matching entry does not yet exist -- create one
rval = new BucketWrapperImpl(bucket);
bucketToWrapper.put(bucket, rval);
}
return rval;
}
/**
* Constructor - initialize the 'bucket' field.
*/
BucketWrapperImpl(Bucket bucket) {
this.bucket = bucket;
}
/**
* {@inheritDoc}
*/
@Override
public int getBucketNumber() {
return bucket.getIndex();
}
/**
* {@inheritDoc}
*/
@Override
public ServerWrapper getOwner() {
return ServerWrapperImpl.getWrapper(bucket.getOwner());
}
/**
* {@inheritDoc}
*/
@Override
public ServerWrapper getPrimaryBackup() {
return ServerWrapperImpl.getWrapper(bucket.getPrimaryBackup());
}
/**
* {@inheritDoc}
*/
@Override
public ServerWrapper getSecondaryBackup() {
return ServerWrapperImpl.getWrapper(bucket.getSecondaryBackup());
}
/* ============================================================ */
/**
* This class implements the 'BucketWrapper.Static' interface. There is
* one 'BucketWrapperImpl.Static' class, and one instance for each
* simulated host
*/
public static class Static implements BucketWrapper.Static {
/**
* {@inheritDoc}
*/
@Override
public int getBucketCount() {
return Bucket.BUCKETCOUNT;
}
/**
* {@inheritDoc}
*/
@Override
public int bucketNumber(String value) {
return Bucket.bucketNumber(value);
}
/**
* {@inheritDoc}
*/
@Override
public ServerWrapper bucketToServer(int bucketNumber) {
return ServerWrapperImpl.getWrapper(Bucket.bucketToServer(bucketNumber));
}
/**
* {@inheritDoc}
*/
@Override
public BucketWrapper getBucket(int bucketNumber) {
return getWrapper(Bucket.getBucket(bucketNumber));
}
/**
* {@inheritDoc}
*/
@Override
public boolean isKeyOnThisServer(String key) {
return Bucket.isKeyOnThisServer(key);
}
/**
* {@inheritDoc}
*/
@Override
public void moveBucket(PrintStream out, int bucketNumber, String newHostUuid) {
ClassLoader save = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(
BucketWrapperImpl.class.getClassLoader());
Bucket.moveBucket(out, bucketNumber, newHostUuid);
} finally {
Thread.currentThread().setContextClassLoader(save);
}
}
/**
* {@inheritDoc}
*/
@Override
public void dumpAdjuncts(PrintStream out) {
Bucket.dumpAdjuncts(out);
}
}
}
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