uri-resolver/src/main/java/org/gcube/datatransfer/resolver/services/GisResolver.java

254 lines
9.3 KiB
Java

/**
*
*/
package org.gcube.datatransfer.resolver.services;
import java.net.URI;
import java.net.URLEncoder;
import java.util.Random;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.datatransfer.resolver.caches.LoadingGeoExplorerApplicationURLCache;
import org.gcube.datatransfer.resolver.caches.LoadingGeonetworkInstanceCache;
import org.gcube.datatransfer.resolver.caches.LoadingGisViewerApplicationURLCache;
import org.gcube.datatransfer.resolver.gis.GeonetworkInstance;
import org.gcube.datatransfer.resolver.gis.MetadataConverter;
import org.gcube.datatransfer.resolver.gis.entity.GisLayerItem;
import org.gcube.datatransfer.resolver.gis.exception.GeonetworkInstanceException;
import org.gcube.datatransfer.resolver.gis.exception.IllegalArgumentException;
import org.gcube.datatransfer.resolver.services.error.ExceptionManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The Class GisResolver.
*
* @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
* Nov 2, 2018
*/
@Path("gis")
public class GisResolver {
private static Logger logger = LoggerFactory.getLogger(GisResolver.class);
public static String help = "https://wiki.gcube-system.org/gcube/URI_Resolver#GIS_Resolver";
public static final String UTF_8 = "UTF-8";
public static final String GIS_UUID = "gis-UUID";
public static final String SCOPE = "scope";
public static final String GEO_EXPLORER_LAYER_UUID = "geo-exp";
/**
* Submit get.
*
* @param req the req
* @param scope the scope
* @param gisUUID the gis uuid
* @param geoExplorerUUID the geo explorer uuid
* @return the response
*/
@GET
@Path("")
public Response submitGet(@Context HttpServletRequest req, @QueryParam(SCOPE) String scope, @QueryParam(GIS_UUID) String gisUUID, @QueryParam(GEO_EXPLORER_LAYER_UUID) String geoExplorerUUID){
logger.info(this.getClass().getSimpleName()+" GET starts...");
boolean isGisLink = false;
boolean isGeoExplorerLink = false;
if(scope==null || scope.isEmpty()){
logger.error("Query Parameter 'scope' not found");
ExceptionManager.throwBadRequestException(req, "Missing mandatory query parameter 'scope'", this.getClass(), help);
}
if(gisUUID==null || gisUUID.isEmpty()){
logger.error("Path Parameter 'gis-UUID' not found");
ExceptionManager.throwBadRequestException(req, "Missing mandatory query parameter 'gis-UUID'", this.getClass(), help);
}else
isGisLink = true;
logger.info(SCOPE +" is: " + scope);
logger.info(GIS_UUID +" is: " + gisUUID);
if (geoExplorerUUID == null || geoExplorerUUID.isEmpty()) {
logger.debug(GEO_EXPLORER_LAYER_UUID+ " not found");
}else
isGeoExplorerLink = true;
logger.info(GEO_EXPLORER_LAYER_UUID +" is: " + geoExplorerUUID);
if(!isGisLink && !isGeoExplorerLink){
String err = GIS_UUID+" or "+GEO_EXPLORER_LAYER_UUID+" not found or empty in the query string";
logger.error(err);
ExceptionManager.throwBadRequestException(req, err, this.getClass(), help);
}
try {
if(isGisLink){
ScopeProvider.instance.set(scope);
//ServerParameters geonetworkParams = getCachedServerParameters(scope);
GisLayerItem gisLayerItem = getGisLayerForLayerUUID(scope, gisUUID);
logger.info("wms url is: " + gisLayerItem.getFullWmsUrlRequest());
String wmsRequest = URLEncoder.encode(gisLayerItem.getFullWmsUrlRequest(), UTF_8);
logger.info("encoded WMS url is: " + wmsRequest);
String layerTitle = null;
if(gisLayerItem.getCitationTitle()!=null && !gisLayerItem.getCitationTitle().isEmpty())
layerTitle = URLEncoder.encode(gisLayerItem.getCitationTitle(), UTF_8);
logger.info("layer Title encoded is: " + layerTitle);
String gisViewerPortletUrl = getGisViewerApplicationURL(scope);
logger.info("Gis Viewer Application url is: " + gisViewerPortletUrl);
gisViewerPortletUrl+="?rid="+new Random().nextLong()
+"&wmsrequest="+wmsRequest
+"&uuid="+URLEncoder.encode(gisUUID, UTF_8);
if(layerTitle!=null)
gisViewerPortletUrl+="&layertitle="+layerTitle;
logger.info("Redirecting to: "+gisViewerPortletUrl);
return Response.seeOther(new URI(gisViewerPortletUrl)).build();
}
if(isGeoExplorerLink){
ScopeProvider.instance.set(scope);
String geoExplorerPortletUrl = getGeoExplorerApplicationURL(scope);
logger.info("GeoExplorer Application url is: " + geoExplorerPortletUrl);
geoExplorerPortletUrl+="?rid="+new Random().nextLong()
+"&luuid="+URLEncoder.encode(geoExplorerUUID, UTF_8);
//urlRedirect(req, resp, geoExplorerPortletUrl);
return Response.seeOther(new URI(geoExplorerPortletUrl)).build();
}
ExceptionManager.throwBadRequestException(req, GIS_UUID+" or "+GEO_EXPLORER_LAYER_UUID+" not found or empty in the query string", this.getClass(), help);
return null;
} catch (Exception e) {
logger.error("Exception:", e);
String error = "Sorry, an error occurred on resolving request with UUID "+gisUUID+" and scope "+scope+". Please, contact support!";
ExceptionManager.throwInternalErrorException(req, error, this.getClass(), help);
return null;
}
}
/**
* Gets the gis viewer application url.
*
* @param scope the scope
* @return the gis viewer application url
* @throws Exception the exception
*/
protected String getGisViewerApplicationURL(String scope) throws Exception{
logger.info("Tentative of recovering gis viewer application hostname from cache for scope: "+scope);
String gisViewerAppHostname = LoadingGisViewerApplicationURLCache.getCache().get(scope);
if(gisViewerAppHostname==null){
// logger.info("Gis viewer application hostname is null, reading from application profile..");
// String url = LoadingGisViewerApplicationURLCache.loadGisViewerApplicationURL(scope);
// LoadingGisViewerApplicationURLCache.getCache().put(scope, url);
// logger.info("Updated GisViewerApplication cache! Scope "+scope+" linking "+url);
// return url;
throw new Exception("GisViewer Application not found in the scope: "+scope);
}else
logger.info("Cache for GisViewerApplication end point is not null using it");
return gisViewerAppHostname;
}
/**
* Gets the gis layer for layer uuid.
*
* @param scope the scope
* @param gisUUID the gis uuid
* @return the gis layer for layer uuid
* @throws Exception the exception
*/
protected GisLayerItem getGisLayerForLayerUUID(String scope, String gisUUID) throws Exception{
try {
GeonetworkInstance gi = getCachedGeonetworkInstance(scope);
GisLayerItem gisLayerItem = MetadataConverter.getWMSOnLineResource(gi, gisUUID);
return gisLayerItem;
//TODO CREATE A BEAN ADDING WMS REQUEST AND LAYER TITLE MetadataConverter.
}catch (GeonetworkInstanceException e){
logger.error("An error occurred when instancing geonetowrk gis layer with UUID "+gisUUID, e);
throw new IllegalArgumentException("Sorry, An error occurred when instancing geonetwork with UUID: "+gisUUID);
} catch (Exception e) {
logger.error("An error occurred when retrieving gis layer with UUID "+gisUUID, e);
throw new IllegalArgumentException("Sorry, An error occurred when retrieving gis layer with UUID "+gisUUID);
}
}
/**
* Gets the cached geonetwork instance.
*
* @param scope the scope
* @return the cached geonetwork instance
* @throws Exception the exception
*/
protected GeonetworkInstance getCachedGeonetworkInstance(String scope) throws Exception{
logger.info("Attempt to get the GeonetworkInstance from cache by scope: "+scope);
GeonetworkInstance geonInstance = LoadingGeonetworkInstanceCache.getCache().get(scope);
if(geonInstance==null){
logger.info("GeonetworkInstance is null in cache, reading from library...");
try {
geonInstance = LoadingGeonetworkInstanceCache.loadGeonetworkInstance(scope);
LoadingGeonetworkInstanceCache.getCache().put(scope, geonInstance);
logger.info("Updated GeonetworkInstance cache! Scope "+scope+" linking "+geonInstance);
} catch (Exception e) {
logger.error("An error occurred on getting GeonetworkInstance for scope: "+scope, e);
throw new Exception("Sorry, An error occurred on getting GeonetworkInstance for scope: "+scope);
}
}else
logger.info("GeonetworkInstance is not null using it");
logger.info("returning GeonetworkInstance: "+geonInstance);
return geonInstance;
}
/**
* Gets the geo explorer application url.
*
* @param scope the scope
* @return the geo explorer application url
* @throws Exception the exception
*/
protected String getGeoExplorerApplicationURL(String scope) throws Exception{
logger.info("Tentative of recovering geo explorer application hostname from cache for scope: "+scope);
String geoExplorerApplicationHostname = LoadingGeoExplorerApplicationURLCache.getCache().get(scope);
if(geoExplorerApplicationHostname==null){
logger.info("GeoExplorer application hostname is null, reading from application profile..");
String url = LoadingGeoExplorerApplicationURLCache.loadGeoExplorerApplicationURL(scope);
LoadingGeoExplorerApplicationURLCache.getCache().put(scope, url);
logger.info("Updated GeoExplorerApplication cache! Scope "+scope+" linking "+url);
return url;
}else
logger.info("Cache for GeoExplorerApplication end point is not null using it");
return geoExplorerApplicationHostname;
}
}