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* Licensed to the Apache Software Foundation (ASF) under one *
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* 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 *
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* specific language governing permissions and limitations *
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package org.apache.james.jspf.executor;
import org.apache.james.jspf.core.DNSLookupContinuation;
import org.apache.james.jspf.core.DNSResponse;
import org.apache.james.jspf.core.DNSService;
import org.apache.james.jspf.core.Logger;
import org.apache.james.jspf.core.SPFChecker;
import org.apache.james.jspf.core.SPFCheckerExceptionCatcher;
import org.apache.james.jspf.core.SPFSession;
import org.apache.james.jspf.core.exceptions.SPFResultException;
import org.apache.james.jspf.core.exceptions.TimeoutException;
/**
* Synchronous implementation of SPFExecuter. All queries will get executed synchronously
*/
public class SynchronousSPFExecutor implements SPFExecutor {
private Logger log;
private DNSService dnsProbe;
public SynchronousSPFExecutor(Logger log, DNSService service) {
this.log = log;
this.dnsProbe = service;
}
/**
* @see org.apache.james.jspf.executor.SPFExecutor#execute(org.apache.james.jspf.core.SPFSession, org.apache.james.jspf.executor.FutureSPFResult)
*/
public void execute(SPFSession session, FutureSPFResult result) {
SPFChecker checker;
while ((checker = session.popChecker()) != null) {
// only execute checkers we added (better recursivity)
log.debug("Executing checker: " + checker);
try {
DNSLookupContinuation cont = checker.checkSPF(session);
// if the checker returns a continuation we return it
while (cont != null) {
DNSResponse response;
try {
response = new DNSResponse(dnsProbe.getRecords(cont
.getRequest()));
} catch (TimeoutException e) {
response = new DNSResponse(e);
}
cont = cont.getListener().onDNSResponse(response, session);
}
} catch (Exception e) {
while (e != null) {
while (checker == null || !(checker instanceof SPFCheckerExceptionCatcher)) {
checker = session.popChecker();
}
try {
((SPFCheckerExceptionCatcher) checker).onException(e, session);
e = null;
} catch (SPFResultException ex) {
e = ex;
} finally {
checker = null;
}
}
}
}
result.setSPFResult(session);
}
}