/*
* @(#)$Id$
*
* Copyright 2006-2008 Makoto YUI
*
* 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.
*
* Contributors:
* Makoto YUI - initial implementation
*/
package xbird.engine.backend;
import java.rmi.RemoteException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import xbird.engine.*;
import xbird.engine.Request.Signature;
import xbird.engine.request.CompileRequest;
import xbird.xquery.XQueryException;
import xbird.xquery.expr.XQExpression;
import xbird.xquery.meta.StaticContext;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class DistributedCompiler extends BackendProcessor {
private static final Log LOG = LogFactory.getLog(DistributedCompiler.class);
public DistributedCompiler(ResponseListener handler) {
super(handler);
}
public Signature associatedWith() {
return Signature.COMPILE;
}
public void fire(RequestContext rc) throws RemoteException {
rc.setFired(System.currentTimeMillis());
final Request request = rc.getRequest();
final Signature rsig = request.getSignature();
if(rsig != Signature.COMPILE) {
throw new IllegalStateException("Illegal command is passed to DistributedCompileProcessor: "
+ rsig);
}
final CompileRequest compileRequest = (CompileRequest) request;
final XQExpression rawExpr = compileRequest.getExpression();
final StaticContext statEnv = new StaticContext();
final XQExpression compiledExpr;
try {
compiledExpr = rawExpr.staticAnalysis(statEnv);
} catch (XQueryException e) {
rc.setFault(e);
_resHandler.onResponse(rc);
return;
}
rc.setResult(compiledExpr);
try {
_resHandler.onResponse(rc);
} catch (RemoteException re) {
LOG.error("The respond for the request '" + rc.getRequest().getIdentifier()
+ "' is failed", re);
}
}
/** nop */
public void cancel(RequestContext rc) throws RemoteException {}
}