Java tutorial
/* * The MIT License * * Copyright 2015 iychoi. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package stargate.drivers.userinterface.http; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URI; import java.util.Collection; import javax.ws.rs.DefaultValue; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam; import javax.ws.rs.Produces; import javax.ws.rs.QueryParam; import javax.ws.rs.WebApplicationException; import javax.ws.rs.core.MediaType; import javax.ws.rs.core.Response; import javax.ws.rs.core.StreamingOutput; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import stargate.commons.cluster.RemoteCluster; import stargate.commons.recipe.DataObjectMetadata; import stargate.commons.recipe.DataObjectPath; import stargate.commons.recipe.Recipe; import stargate.commons.restful.RestfulResponse; import stargate.commons.service.ServiceNotStartedException; import stargate.commons.userinterface.AUserInterfaceServer; import stargate.commons.volume.Directory; import stargate.server.service.StargateService; /** * * @author iychoi */ @Path(HTTPUserInterfaceRestfulConstants.BASE_PATH) public class HTTPUserInterfaceServlet extends AUserInterfaceServer { private static final Log LOG = LogFactory.getLog(HTTPUserInterfaceServlet.class); @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_LIVE_PATH) @Produces(MediaType.APPLICATION_JSON) public Response isLiveRestful() { try { RestfulResponse<Boolean> rres = new RestfulResponse<Boolean>(isLive()); return Response.status(Response.Status.OK).entity(rres).build(); } catch (Exception ex) { RestfulResponse<Boolean> rres = new RestfulResponse<Boolean>(ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } @Override public boolean isLive() { return true; } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_CLUSTER_PATH) @Produces(MediaType.APPLICATION_JSON) public Response getClusterRestful() { try { RestfulResponse<RemoteCluster> rres = new RestfulResponse<RemoteCluster>(getCluster()); return Response.status(Response.Status.OK).entity(rres).build(); } catch (Exception ex) { RestfulResponse<RemoteCluster> rres = new RestfulResponse<RemoteCluster>(ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } @Override public RemoteCluster getCluster() throws IOException { try { StargateService service = StargateService.getInstance(); return service.getClusterManager().getLocalClusterManager().toRemoteCluster(); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_DIRECTORY_PATH) @Produces(MediaType.APPLICATION_JSON) public Response getDirectoryRestful(@DefaultValue("") @QueryParam("path") String path) { try { RestfulResponse<Directory> rres = new RestfulResponse<Directory>(getDirectory(path)); return Response.status(Response.Status.OK).entity(rres).build(); } catch (Exception ex) { RestfulResponse<Directory> rres = new RestfulResponse<Directory>(ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } private Directory getDirectory(String path) throws IOException { if (path == null || path.isEmpty()) { throw new IllegalArgumentException("path is null or empty"); } DataObjectPath objectPath = new DataObjectPath(path); return getDirectory(objectPath); } @Override public Directory getDirectory(DataObjectPath path) throws IOException { if (path == null) { throw new IllegalArgumentException("path is null"); } try { StargateService service = StargateService.getInstance(); return service.getVolumeManager().getDirectory(path); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_METADATA_PATH) @Produces(MediaType.APPLICATION_JSON) public Response getDataObjectMetadataRestful(@DefaultValue("") @QueryParam("path") String path) { try { RestfulResponse<DataObjectMetadata> rres = new RestfulResponse<DataObjectMetadata>( getDataObjectMetadata(path)); return Response.status(Response.Status.OK).entity(rres).build(); } catch (FileNotFoundException ex) { return Response.status(Response.Status.NOT_FOUND).entity(ex.toString()).build(); } catch (Exception ex) { RestfulResponse<DataObjectMetadata> rres = new RestfulResponse<DataObjectMetadata>(ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } private DataObjectMetadata getDataObjectMetadata(String path) throws IOException, FileNotFoundException { if (path == null || path.isEmpty()) { throw new IllegalArgumentException("path is null or empty"); } DataObjectPath objectPath = new DataObjectPath(path); return getDataObjectMetadata(objectPath); } @Override public DataObjectMetadata getDataObjectMetadata(DataObjectPath path) throws IOException, FileNotFoundException { if (path == null) { throw new IllegalArgumentException("path is null"); } try { StargateService service = StargateService.getInstance(); return service.getVolumeManager().getDataObjectMetadata(path); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_RECIPE_PATH) @Produces(MediaType.APPLICATION_JSON) public Response getRecipeRestful(@DefaultValue("") @QueryParam("path") String path) { try { RestfulResponse<Recipe> rres = new RestfulResponse<Recipe>(getRecipe(path)); return Response.status(Response.Status.OK).entity(rres).build(); } catch (Exception ex) { RestfulResponse<Recipe> rres = new RestfulResponse<Recipe>(ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } private Recipe getRecipe(String path) throws IOException { if (path == null || path.isEmpty()) { throw new IllegalArgumentException("path is null or empty"); } DataObjectPath objectPath = new DataObjectPath(path); return getRecipe(objectPath); } @Override public Recipe getRecipe(DataObjectPath path) throws IOException { if (path == null) { throw new IllegalArgumentException("path is null"); } try { StargateService service = StargateService.getInstance(); return service.getVolumeManager().getRecipe(path); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_LIST_METADATA_PATH) @Produces(MediaType.APPLICATION_JSON) public Response listDataObjectMetadataRestful(@DefaultValue("") @QueryParam("path") String path) { try { RestfulResponse<Collection<DataObjectMetadata>> rres = new RestfulResponse<Collection<DataObjectMetadata>>( listDataObjectMetadata(path)); return Response.status(Response.Status.OK).entity(rres).build(); } catch (Exception ex) { RestfulResponse<Collection<DataObjectMetadata>> rres = new RestfulResponse<Collection<DataObjectMetadata>>( ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } private Collection<DataObjectMetadata> listDataObjectMetadata(String path) throws IOException { if (path == null || path.isEmpty()) { throw new IllegalArgumentException("path is null or empty"); } DataObjectPath objectPath = new DataObjectPath(path); return listDataObjectMetadata(objectPath); } @Override public Collection<DataObjectMetadata> listDataObjectMetadata(DataObjectPath path) throws IOException { if (path == null) { throw new IllegalArgumentException("path is null"); } try { StargateService service = StargateService.getInstance(); return service.getVolumeManager().listDataObjectMetadata(path); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_DATACHUNK_PATH + "/{clusterName:.*}/{hash:.*}") @Produces(MediaType.APPLICATION_OCTET_STREAM) public Response getDataChunkRestful(@DefaultValue("") @PathParam("clusterName") String clusterName, @DefaultValue("") @PathParam("hash") String hash) throws Exception { try { final InputStream is = getDataChunk(clusterName, hash); if (is == null) { return Response.status(Response.Status.NOT_FOUND).build(); } StreamingOutput stream = new StreamingOutput() { @Override public void write(OutputStream out) throws IOException, WebApplicationException { try { int buffersize = 100 * 1024; byte[] buffer = new byte[buffersize]; int read = 0; while ((read = is.read(buffer)) > 0) { out.write(buffer, 0, read); } is.close(); } catch (Exception ex) { throw new WebApplicationException(ex); } } }; return Response.ok(stream).header("content-disposition", "attachment; filename = " + hash).build(); } catch (Exception ex) { return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build(); } } @Override public InputStream getDataChunk(String clusterName, String hash) throws IOException { if (clusterName == null || clusterName.isEmpty()) { throw new IllegalArgumentException("clusterName is null or empty"); } if (hash == null || hash.isEmpty()) { throw new IllegalArgumentException("hash is null or empty"); } try { StargateService service = StargateService.getInstance(); return service.getVolumeManager().getDataChunk(clusterName, hash); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } @GET @Path(HTTPUserInterfaceRestfulConstants.RESTFUL_LOCAL_CLUSTER_RESOURCE_PATH) @Produces(MediaType.APPLICATION_JSON) public Response getLocalResourcePathRestful(@DefaultValue("") @QueryParam("path") String path) { try { RestfulResponse<URI> rres = new RestfulResponse<URI>(getLocalResourcePath(path)); return Response.status(Response.Status.OK).entity(rres).build(); } catch (Exception ex) { RestfulResponse<URI> rres = new RestfulResponse<URI>(ex); return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(rres).build(); } } private URI getLocalResourcePath(String path) throws IOException { if (path == null || path.isEmpty()) { throw new IllegalArgumentException("path is null or empty"); } DataObjectPath objectPath = new DataObjectPath(path); return getLocalResourcePath(objectPath); } @Override public URI getLocalResourcePath(DataObjectPath path) throws IOException { if (path == null) { throw new IllegalArgumentException("path is null"); } try { StargateService service = StargateService.getInstance(); return service.getVolumeManager().getLocalResourcePath(path); } catch (ServiceNotStartedException ex) { throw new IOException(ex); } } }