com.sun.enterprise.admin.remote.RemoteResponseManager Maven / Gradle / Ivy
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package com.sun.enterprise.admin.remote;
import java.io.*;
import java.util.*;
import java.util.jar.*;
import java.util.logging.Logger;
import com.sun.enterprise.util.io.FileUtils;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
import static com.sun.enterprise.util.StringUtils.ok;
/**
* This class is responsible for handling the Remote Server response.
* Note that an unusul paradigm is used here. Success is signaled by throwing
* a "success" exception. This breaks the overarching rule about Exceptions but
* is very useful in CLI. CLI has the pattern of:
* Error: Throw an Exception
* Success: Don't throw an Exception
* The logic becomes difficult. The command itself has to know how to print a
* success message properly instead of just putting such a message inside an Exception
* object and throwing it. In such a system it is cleaner to do this:
* Error: throw failure exception
* Success: throw success exception
* @author bnevins
*/
public class RemoteResponseManager implements ResponseManager {
private static final LocalStringsImpl strings =
new LocalStringsImpl(RemoteResponseManager.class);
public RemoteResponseManager(InputStream in, int code, Logger logger)
throws RemoteException, IOException {
this.code = code;
this.logger = logger;
// make a copy of the stream. O/w if Manifest.read() blows up -- the
// data would be gone!
ByteArrayOutputStream baos = new ByteArrayOutputStream();
FileUtils.copy(in, baos, 0);
responseStream = new ByteArrayInputStream(baos.toByteArray());
response = baos.toString();
if(!ok(response))
throw new RemoteFailureException(strings.get("emptyResponse"));
logger.finer("------- RAW RESPONSE ---------");
logger.finer(response);
logger.finer("------- RAW RESPONSE ---------");
}
public void process() throws RemoteException {
checkCode(); // Exception == Goodbye!
try {
handleManifest();
}
catch(RemoteFailureException e) {
// Manifest obj was ok -- remote failure
throw e;
}
catch(IOException e) {
// ignore -- move on to Plain Text...
}
// put a try around this if another type of response is added...
handlePlainText();
throw new RemoteFailureException(strings.get("internal", response));
}
public Map getMainAtts() {
return mainAtts;
}
private void checkCode() throws RemoteFailureException {
if(code != HTTP_SUCCESS_CODE) {
throw new RemoteFailureException(strings.get("badHttpCode", code));
}
}
private void handleManifest() throws RemoteException, IOException{
ManifestManager mgr = new ManifestManager(responseStream, logger);
mainAtts = mgr.getMainAtts();
mgr.process();
}
private void handlePlainText() throws RemoteException{
PlainTextManager mgr = new PlainTextManager(response);
mgr.process();
}
private int code;
private Logger logger;
final InputStream responseStream;
final String response;
private static final int HTTP_SUCCESS_CODE = 200;
private Manifest m;
private Map mainAtts = Collections.emptyMap();
}