Mercurial > dive4elements > river
changeset 4298:1f98a3a89e13
New client side service for sediment load infos.
The service requests an sediment load overview and creates info objects for the
received data.
author | Raimund Renkert <rrenkert@intevation.de> |
---|---|
date | Mon, 29 Oct 2012 13:13:23 +0100 |
parents | 6d44914b2dd4 |
children | abd304085bd4 |
files | flys-client/src/main/java/de/intevation/flys/client/client/services/SedimentLoadInfoService.java flys-client/src/main/java/de/intevation/flys/client/client/services/SedimentLoadInfoServiceAsync.java flys-client/src/main/java/de/intevation/flys/client/server/SedimentLoadInfoServiceImpl.java flys-client/src/main/java/de/intevation/flys/client/shared/model/SedimentLoadInfoObject.java flys-client/src/main/java/de/intevation/flys/client/shared/model/SedimentLoadInfoObjectImpl.java flys-client/src/main/webapp/WEB-INF/web.xml |
diffstat | 6 files changed, 258 insertions(+), 0 deletions(-) [+] |
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line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/client/services/SedimentLoadInfoService.java Mon Oct 29 13:13:23 2012 +0100 @@ -0,0 +1,30 @@ +package de.intevation.flys.client.client.services; + +import com.google.gwt.user.client.rpc.RemoteService; +import com.google.gwt.user.client.rpc.RemoteServiceRelativePath; + +import de.intevation.flys.client.shared.exceptions.ServerException; +import de.intevation.flys.client.shared.model.DischargeInfoObject; +import de.intevation.flys.client.shared.model.SedimentLoadInfoObject; + +/** + * This service is used to fetch a list of SedimentLoadInfoObjects from artifact + * server for a specific river. + * + * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> + */ +@RemoteServiceRelativePath("sedimentloadinfo") +public interface SedimentLoadInfoService extends RemoteService { + + /** + * This method returns a list of SedimentLoadInfoObjects for a specific river. + */ + SedimentLoadInfoObject[] getSedimentLoadInfo( + String locale, + String river, + String type, + double startKm, + double endKm) + throws ServerException; +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/client/services/SedimentLoadInfoServiceAsync.java Mon Oct 29 13:13:23 2012 +0100 @@ -0,0 +1,20 @@ +package de.intevation.flys.client.client.services; + +import com.google.gwt.user.client.rpc.AsyncCallback; + +import de.intevation.flys.client.shared.model.SedimentLoadInfoObject; + +/** + * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> + */ +public interface SedimentLoadInfoServiceAsync { + + void getSedimentLoadInfo( + String locale, + String river, + String type, + double startKm, + double endKm, + AsyncCallback<SedimentLoadInfoObject[]> cb); +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/server/SedimentLoadInfoServiceImpl.java Mon Oct 29 13:13:23 2012 +0100 @@ -0,0 +1,152 @@ +package de.intevation.flys.client.server; + +import java.util.ArrayList; +import java.util.List; + +import org.apache.log4j.Logger; +import org.w3c.dom.Document; +import org.w3c.dom.Element; +import org.w3c.dom.NodeList; + +import com.google.gwt.user.server.rpc.RemoteServiceServlet; + +import de.intevation.artifacts.common.ArtifactNamespaceContext; +import de.intevation.artifacts.common.utils.XMLUtils; +import de.intevation.artifacts.httpclient.exceptions.ConnectionException; +import de.intevation.artifacts.httpclient.http.HttpClient; +import de.intevation.artifacts.httpclient.http.HttpClientImpl; +import de.intevation.flys.client.client.services.SedimentLoadInfoService; +import de.intevation.flys.client.shared.exceptions.ServerException; +import de.intevation.flys.client.shared.model.SedimentLoadInfoObject; +import de.intevation.flys.client.shared.model.SedimentLoadInfoObjectImpl; + + +public class SedimentLoadInfoServiceImpl +extends RemoteServiceServlet +implements SedimentLoadInfoService +{ + private static final Logger logger = + Logger.getLogger(SedimentLoadInfoServiceImpl.class); + + public static final String ERROR_NO_SEDIMENTLOADINFO_FOUND = + "error_no_sedimentloadinfo_found"; + + @Override + public SedimentLoadInfoObject[] getSedimentLoadInfo( + String locale, + String river, + String type, + double startKm, + double endKm) + throws ServerException + { + logger.info("SedimentLoadInfoServiceImpl.getSedimentLoadInfo"); + + String url = getServletContext().getInitParameter("server-url"); + + Document doc = XMLUtils.newDocument(); + + XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( + doc, + ArtifactNamespaceContext.NAMESPACE_URI, + ArtifactNamespaceContext.NAMESPACE_PREFIX); + + Element riverEl = ec.create("river"); + Element location = ec.create("location"); + Element from = ec.create("from"); + Element to = ec.create("to"); + Element typeEl = ec.create("type"); + riverEl.setTextContent(river); + from.setTextContent(String.valueOf(startKm)); + to.setTextContent(String.valueOf(endKm)); + typeEl.setTextContent(type); + + location.appendChild(from); + location.appendChild(to); + riverEl.appendChild(location); + riverEl.appendChild(typeEl); + doc.appendChild(riverEl); + + HttpClient client = new HttpClientImpl(url, locale); + + try { + Document result = client.callService(url, "sedimentloadinfo", doc); + + logger.debug("Extract sedimentload info objects now."); + SedimentLoadInfoObject[] objects = + extractSedimentLoadInfoObjects(result); + + if (objects != null && objects.length > 0) { + return objects; + } + } + catch (ConnectionException ce) { + logger.error(ce, ce); + } + + throw new ServerException(ERROR_NO_SEDIMENTLOADINFO_FOUND); + } + + + /** + * Extracts all distance info objects from <i>result</i> document. + * + * @param result The document retrieved by the server. + * + * @return a list of DistanceInfoObjects. + */ + protected SedimentLoadInfoObject[] extractSedimentLoadInfoObjects( + Document result) + throws ServerException + { + NodeList list = result.getElementsByTagName("sedimentload"); + + if (list == null || list.getLength() == 0) { + logger.warn("No sedimentload info found."); + throw new ServerException(ERROR_NO_SEDIMENTLOADINFO_FOUND); + } + + int num = list.getLength(); + logger.debug("Response contains " + num + " objects."); + + List<SedimentLoadInfoObject> objects = + new ArrayList<SedimentLoadInfoObject>(num); + + for (int i = 0; i < num; i++) { + SedimentLoadInfoObject obj = buildSedimentLoadInfoObject( + (Element)list.item(i)); + + if (obj != null) { + objects.add(obj); + } + } + + logger.debug("Retrieved " + objects.size() + " sediment loads."); + + return (SedimentLoadInfoObject[]) + objects.toArray(new SedimentLoadInfoObject[num]); + } + + + /** + * Extracts information for a single distance info object and intializes an + * DistanceInfoObject with them. + * + * @param node The node that contains the information. + * + * @return a valid DistanceInfoObject. + */ + protected SedimentLoadInfoObject buildSedimentLoadInfoObject(Element node) { + + String desc = node.getAttribute("description").trim(); + String date = node.getAttribute("date").trim(); + + if (desc.length() > 0 && date.length() > 0) { + return new SedimentLoadInfoObjectImpl(desc, date); + } + + logger.warn("Invalid sediment load info object found."); + + return null; + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/shared/model/SedimentLoadInfoObject.java Mon Oct 29 13:13:23 2012 +0100 @@ -0,0 +1,15 @@ +package de.intevation.flys.client.shared.model; + +import java.io.Serializable; + + +/** + * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> + */ +public interface SedimentLoadInfoObject extends Serializable { + + String getDescription(); + + String getDate(); +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/shared/model/SedimentLoadInfoObjectImpl.java Mon Oct 29 13:13:23 2012 +0100 @@ -0,0 +1,31 @@ +package de.intevation.flys.client.shared.model; + + +/** + * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> + */ +public class SedimentLoadInfoObjectImpl implements SedimentLoadInfoObject { + + protected String description; + protected String dateString; + + public SedimentLoadInfoObjectImpl() { + } + + public SedimentLoadInfoObjectImpl( + String description, + String dateString + ) { + this.description = description; + this.dateString = dateString; + } + + public String getDescription() { + return description; + } + + public String getDate() { + return this.dateString; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : \ No newline at end of file
--- a/flys-client/src/main/webapp/WEB-INF/web.xml Mon Oct 29 13:09:16 2012 +0100 +++ b/flys-client/src/main/webapp/WEB-INF/web.xml Mon Oct 29 13:13:23 2012 +0100 @@ -533,6 +533,16 @@ </servlet-mapping> <servlet> + <servlet-name>SedimentLoadInfo</servlet-name> + <servlet-class>de.intevation.flys.client.server.SedimentLoadInfoServiceImpl</servlet-class> + </servlet> + + <servlet-mapping> + <servlet-name>SedimentLoadInfo</servlet-name> + <url-pattern>/flys/sedimentloadinfo</url-pattern> + </servlet-mapping> + + <servlet> <servlet-name>login</servlet-name> <servlet-class>de.intevation.flys.client.server.LoginServlet</servlet-class> </servlet>