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/*
* Copyright 2006-2012 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. 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.
*/
package com.amazon.carbonado.repo.logging;
import com.amazon.carbonado.FetchException;
import com.amazon.carbonado.PersistException;
import com.amazon.carbonado.Query;
import com.amazon.carbonado.Storable;
import com.amazon.carbonado.Storage;
import com.amazon.carbonado.Trigger;
import com.amazon.carbonado.filter.Filter;
/**
*
*
* @author Brian S O'Neill
*/
class LoggingStorage<S extends Storable> implements Storage<S> {
private final Storage<S> mStorage;
final Log mLog;
LoggingStorage(LoggingRepository repo, Storage<S> storage) {
mStorage = storage;
mLog = repo.getLog();
storage.addTrigger(new LoggingTrigger<S>(mLog));
}
public Class<S> getStorableType() {
return mStorage.getStorableType();
}
public S prepare() {
return mStorage.prepare();
}
public Query<S> query() throws FetchException {
return new LoggingQuery<S>(this, mStorage.query());
}
public Query<S> query(String filter) throws FetchException {
return new LoggingQuery<S>(this, mStorage.query(filter));
}
public Query<S> query(Filter<S> filter) throws FetchException {
return new LoggingQuery<S>(this, mStorage.query(filter));
}
/**
* @since 1.2
*/
public void truncate() throws PersistException {
if (mLog.isEnabled()) {
mLog.write("Storage.truncate() on " + getStorableType().getClass());
}
mStorage.truncate();
}
public boolean addTrigger(Trigger<? super S> trigger) {
return mStorage.addTrigger(trigger);
}
public boolean removeTrigger(Trigger<? super S> trigger) {
return mStorage.removeTrigger(trigger);
}
protected Query<S> wrap(Query<S> query) {
return new LoggingQuery<S>(this, query);
}
private static class LoggingTrigger<S extends Storable> extends Trigger<S> {
private final Log mLog;
LoggingTrigger(Log log) {
mLog = log;
}
@Override
public Object beforeInsert(S storable) {
if (mLog.isEnabled()) {
mLog.write("Storable.insert() on " + storable.toString());
}
return null;
}
@Override
public Object beforeTryInsert(S storable) {
if (mLog.isEnabled()) {
mLog.write("Storable.tryInsert() on " + storable.toString());
}
return null;
}
@Override
public Object beforeUpdate(S storable) {
if (mLog.isEnabled()) {
mLog.write("Storable.update() on " + storable.toString());
}
return null;
}
@Override
public Object beforeTryUpdate(S storable) {
if (mLog.isEnabled()) {
mLog.write("Storable.tryUpdate() on " + storable.toString());
}
return null;
}
@Override
public Object beforeDelete(S storable) {
if (mLog.isEnabled()) {
mLog.write("Storable.delete() on " + storable.toString());
}
return null;
}
@Override
public Object beforeTryDelete(S storable) {
if (mLog.isEnabled()) {
mLog.write("Storable.tryDelete() on " + storable.toString());
}
return null;
}
@Override
public void afterLoad(S storable) {
if (mLog.isEnabled()) {
mLog.write("Loaded " + storable.toString());
}
}
}
}
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