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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 org.apache.qpid.server.configuration.store;
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.UUID;
import org.apache.qpid.server.configuration.ConfigurationEntry;
import org.apache.qpid.server.configuration.IllegalConfigurationException;
import org.apache.qpid.server.model.ConfiguredObject;
import org.apache.qpid.server.store.ConfiguredObjectRecord;
import org.apache.qpid.server.store.DurableConfigurationStore;
import org.apache.qpid.server.store.StoreException;
import org.apache.qpid.server.store.handler.ConfiguredObjectRecordHandler;
public class JsonConfigurationEntryStore extends MemoryConfigurationEntryStore
{
public static final String STORE_TYPE = "json";
private final ConfiguredObject<?> _parentObject;
private File _storeFile;
public JsonConfigurationEntryStore(ConfiguredObject<?> parentObject, DurableConfigurationStore initialStore, boolean overwrite, Map<String, String> configProperties)
{
super(configProperties);
_parentObject = parentObject;
String storeLocation = (String) parentObject.getAttribute("storePath");
_storeFile = new File(storeLocation);
if(_storeFile.isDirectory())
{
throw new IllegalConfigurationException("A directory exists at the location for the broker configuration store file: " + storeLocation);
}
if(overwrite && _storeFile.exists())
{
if(!_storeFile.delete())
{
throw new StoreException("Unable to overwrite existing configuration store file as requested: " + storeLocation);
}
}
if ((!_storeFile.exists() || _storeFile.length() == 0))
{
initialiseStore(_storeFile, initialStore);
}
else
{
load(getConfigurationEntryStoreUtil().fileToURL(_storeFile));
}
if(isGeneratedObjectIdDuringLoad())
{
saveAsTree(_storeFile);
}
}
@Override
public synchronized UUID[] remove(final ConfiguredObjectRecord... records)
{
UUID[] removedIds = super.remove(records);
if (removedIds.length > 0)
{
saveAsTree(_storeFile);
}
return removedIds;
}
@Override
public synchronized void save(ConfigurationEntry... entries)
{
if (replaceEntries(entries))
{
saveAsTree(_storeFile);
}
}
@Override
public String getStoreLocation()
{
return _storeFile.getAbsolutePath();
}
@Override
public String getType()
{
return STORE_TYPE;
}
@Override
public String toString()
{
return "JsonConfigurationEntryStore [_storeFile=" + _storeFile + ", _rootId=" + getRootEntry().getId() + "]";
}
private void initialiseStore(File storeFile, DurableConfigurationStore initialStore)
{
createFileIfNotExist(storeFile);
if (initialStore == null)
{
throw new IllegalConfigurationException("Cannot create new store without an initial store");
}
else
{
final Collection<ConfiguredObjectRecord> records = new ArrayList<ConfiguredObjectRecord>();
final ConfiguredObjectRecordHandler replayHandler = new ConfiguredObjectRecordHandler()
{
private int _configVersion;
@Override
public void begin(final int configVersion)
{
_configVersion = configVersion;
}
@Override
public boolean handle(ConfiguredObjectRecord record)
{
records.add(record);
return true;
}
@Override
public int end()
{
return _configVersion;
}
};
initialStore.openConfigurationStore(_parentObject, Collections.<String,Object>emptyMap());
initialStore.visitConfiguredObjectRecords(replayHandler);
update(true, records.toArray(new ConfiguredObjectRecord[records.size()]));
}
}
}
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