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annotate flys-client/src/main/java/de/intevation/flys/client/server/DoCollectionAction.java @ 5779:ebec12def170

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Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200
parents ab8eb2f544f2
children
rev   line source
599
1dbffe4c6d12 Implemented the RPC stubs to set the TTL and name of a collection and to delete an existing collection.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 package de.intevation.flys.client.server;
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2
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3 import org.w3c.dom.Document;
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4
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5 import org.apache.log4j.Logger;
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7 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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8
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9 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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10 import de.intevation.artifacts.common.utils.XMLUtils;
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11
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12 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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13 import de.intevation.artifacts.httpclient.http.HttpClient;
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14 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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15 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
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16
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17 import de.intevation.flys.client.shared.exceptions.ServerException;
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18 import de.intevation.flys.client.shared.model.Collection;
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19
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21 /**
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22 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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23 */
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24 public class DoCollectionAction extends RemoteServiceServlet {
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25
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 599
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26 private static final Logger logger =
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27 Logger.getLogger(DoCollectionAction.class);
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28
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599
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30 public static final String XPATH_RESULT = "/art:result/text()";
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31 public static final String OPERATION_FAILURE = "FAILED";
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32 public static final String FAILURE_EXCEPTION = "collection_action_failed";
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33
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34
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35 protected void doAction(Collection c, Document action, String url)
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36 throws ServerException
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37 {
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38 logger.info("DoCollectionAction.doAction");
ab8eb2f544f2 Replaced stdout and stderr logging with log4j loggers in server classes.
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parents: 599
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39
599
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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40 HttpClient client = new HttpClientImpl(url);
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41
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42 try {
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43 Document res = (Document) client.doCollectionAction(
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44 action, c.identifier(),
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45 new DocumentResponseHandler());
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46
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47 String result = XMLUtils.xpathString(
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48 res,
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49 XPATH_RESULT,
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50 ArtifactNamespaceContext.INSTANCE);
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51
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52 if (result == null || result.equals(OPERATION_FAILURE)) {
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53 logger.error("Operation failed.");
599
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54 throw new ServerException(FAILURE_EXCEPTION);
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55 }
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56 }
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57 catch (ConnectionException ce) {
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58 logger.error(ce, ce);
599
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59 throw new ServerException(FAILURE_EXCEPTION);
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60 }
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61 }
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62 }
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