/*
* Copyright 2002-2007 the original author or authors.
*
* 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 org.springmodules.lucene.index.resource;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import org.springmodules.lucene.index.LuceneIndexingException;
import org.springmodules.lucene.index.factory.IndexReaderFactoryUtils;
import org.springmodules.lucene.index.factory.IndexWriterFactoryUtils;
import org.springmodules.lucene.index.factory.LuceneIndexReader;
import org.springmodules.lucene.index.factory.LuceneIndexWriter;
/**
* Default implementation of ResourceManager interface.
*
* @author Thierry Templier
*/
public class DefaultResourceManager extends AbstractResourceManager {
/**
* Initialize LuceneIndexReader instance if necessary based on the
* specified definition.
*
* @param definition a definition of the resources to initialize
* @return an instance of LuceneIndexWriter
*/
private LuceneIndexReader doInitializeIndexReader(ResourceManagementDefinition definition) {
LuceneIndexReader indexReader = null;
System.out.println("[doInitializeIndexReader] isIndexReaderOpen = "+definition.isIndexReaderOpen());
System.out.println("[doInitializeIndexReader] isWriteOperationsForIndexReaderAuthorized = "+definition.isWriteOperationsForIndexReaderAuthorized());
if( definition.isIndexReaderOpen() ) {
if( definition.isWriteOperationsForIndexReaderAuthorized() ) {
indexReader = getIndexFactory().getIndexReader();
} else {
indexReader = (LuceneIndexReader) Proxy.newProxyInstance(
LuceneIndexReader.class.getClassLoader(),
new Class[] {LuceneIndexReader.class},
new ReadOnlyLuceneIndexReaderInvocationHandler(getIndexFactory().getIndexReader()));
}
}
return indexReader;
}
/**
* Initialize LuceneIndexWriter instance if necessary based on the
* specified definition.
*
* @param definition a definition of the resources to initialize
* @return an instance of LuceneIndexWriter
*/
private LuceneIndexWriter doInitializeIndexWriter(ResourceManagementDefinition definition) {
LuceneIndexWriter indexWriter = null;
System.out.println("[doInitializeIndexReader] isIndexWriterOpen = "+definition.isIndexWriterOpen());
System.out.println("[doInitializeIndexReader] isWriteOperationsForIndexWriterAuthorized = "+definition.isWriteOperationsForIndexWriterAuthorized());
if( definition.isIndexWriterOpen() ) {
if( definition.isWriteOperationsForIndexWriterAuthorized() ) {
indexWriter = getIndexFactory().getIndexWriter();
} else {
indexWriter = (LuceneIndexWriter) Proxy.newProxyInstance(
LuceneIndexWriter.class.getClassLoader(),
new Class[] {LuceneIndexWriter.class},
new ReadOnlyLuceneIndexWriterInvocationHandler(getIndexFactory().getIndexWriter()));
}
}
return indexWriter;
}
/**
* Initialize LuceneIndexReader and/or LuceneIndexWriter according to
* the definition of resource management.
*
* @see AbstractResourceManager#doInitializeResources(ResourceManagementDefinition)
*/
protected ResourceHolder doInitializeResources(ResourceManagementDefinition definition) {
LuceneIndexReader indexReader = doInitializeIndexReader(definition);
LuceneIndexWriter indexWriter = doInitializeIndexWriter(definition);
return new ResourceHolder(indexReader, indexWriter);
}
/**
* Release all the resources initialized.
*
* @see AbstractResourceManager#doReleaseResources(ResourceHolder)
*/
protected void doReleaseResources(ResourceHolder holder) {
LuceneIndexReader indexReader = holder.getIndexReader(false);
IndexReaderFactoryUtils.closeIndexReader(indexReader);
LuceneIndexWriter indexWriter = holder.getIndexWriter(false);
IndexWriterFactoryUtils.closeIndexWriter(indexWriter);
}
/**
* Invocation handler that delegates close calls on JDBC Connections
* to DataSourceUtils for being aware of thread-bound transactions.
*/
private class ReadOnlyLuceneIndexReaderInvocationHandler implements InvocationHandler {
private final String INDEX_READER_FORBIDDEN_METHODS = "deleteDocument,deleteDocuments,setNorm,undeleteAll";
private final LuceneIndexReader indexReader;
public ReadOnlyLuceneIndexReaderInvocationHandler(LuceneIndexReader indexReader) {
this.indexReader = indexReader;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if( INDEX_READER_FORBIDDEN_METHODS.indexOf(method.getName())!=-1 ) {
throw new LuceneIndexingException("Not authorized operation in this context.");
} else {
return method.invoke(indexReader, args);
}
}
}
/**
* Invocation handler that delegates close calls on JDBC Connections
* to DataSourceUtils for being aware of thread-bound transactions.
*/
private class ReadOnlyLuceneIndexWriterInvocationHandler implements InvocationHandler {
private final String INDEX_WRITER_FORBIDDEN_METHODS = "addDocument,addIndexes,optimize," +
"setCommitLockTimeout,setInfoStream,setMaxBufferedDocs,setMaxFieldLength,setMaxMergeDocs," +
"setMergeFactor,setSimilarity,setTermIndexInterval,setUseCompoundFile,setWriteLockTimeout";
private final LuceneIndexWriter indexWriter;
public ReadOnlyLuceneIndexWriterInvocationHandler(LuceneIndexWriter indexWriter) {
this.indexWriter = indexWriter;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if( INDEX_WRITER_FORBIDDEN_METHODS.indexOf(method.getName())!=-1 ) {
throw new LuceneIndexingException("Not authorized operation in this context.");
} else {
return method.invoke(indexWriter, args);
}
}
}
}