319 lines
12 KiB
Java
319 lines
12 KiB
Java
package org.gcube.usecases.ws.thredds.engine.impl;
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import static org.gcube.resources.discovery.icclient.ICFactory.clientFor;
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import static org.gcube.resources.discovery.icclient.ICFactory.queryFor;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.PrintWriter;
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import java.nio.file.Files;
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import java.util.Set;
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import javax.ws.rs.client.Client;
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import javax.ws.rs.client.ClientBuilder;
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import javax.ws.rs.client.WebTarget;
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import javax.ws.rs.core.MediaType;
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import javax.ws.rs.core.Response;
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import org.apache.tika.io.IOUtils;
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import org.gcube.common.resources.gcore.GCoreEndpoint;
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import org.gcube.data.transfer.library.DataTransferClient;
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import org.gcube.data.transfer.library.TransferResult;
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import org.gcube.data.transfer.library.client.AuthorizationFilter;
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import org.gcube.data.transfer.library.faults.DestinationNotSetException;
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import org.gcube.data.transfer.library.faults.FailedTransferException;
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import org.gcube.data.transfer.library.faults.InitializationException;
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import org.gcube.data.transfer.library.faults.InvalidDestinationException;
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import org.gcube.data.transfer.library.faults.InvalidSourceException;
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import org.gcube.data.transfer.library.faults.ServiceNotFoundException;
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import org.gcube.data.transfer.library.faults.SourceNotSetException;
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import org.gcube.data.transfer.library.faults.UnreachableNodeException;
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import org.gcube.data.transfer.model.Destination;
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import org.gcube.data.transfer.model.DestinationClashPolicy;
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import org.gcube.data.transfer.model.PluginInvocation;
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import org.gcube.data.transfer.model.RemoteFileDescriptor;
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import org.gcube.data.transfer.model.plugins.thredds.ThreddsCatalog;
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import org.gcube.data.transfer.model.plugins.thredds.ThreddsInfo;
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import org.gcube.resources.discovery.client.api.DiscoveryClient;
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import org.gcube.resources.discovery.client.queries.api.SimpleQuery;
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import org.gcube.spatial.data.sdi.model.ServiceConstants;
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import org.gcube.spatial.data.sdi.utils.ScopeUtils;
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import org.gcube.usecases.ws.thredds.Constants;
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import org.gcube.usecases.ws.thredds.TokenSetter;
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import org.gcube.usecases.ws.thredds.faults.InternalException;
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import org.gcube.usecases.ws.thredds.faults.RemoteFileNotFoundException;
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import org.gcube.usecases.ws.thredds.faults.UnableToLockException;
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import org.glassfish.jersey.client.ClientConfig;
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import org.glassfish.jersey.client.ClientProperties;
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import lombok.extern.slf4j.Slf4j;
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@Slf4j
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public class ThreddsController {
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private String hostname;
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private String operatingPath;
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private String targetToken;
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public ThreddsController(String path,String targetToken) throws InternalException {
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operatingPath=path;
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this.targetToken=targetToken;
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setTargetToken();
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hostname=getThreddsHost();
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if(hostname==null) throw new InternalException("Unable to find a thredds instance in target scope "+ScopeUtils.getCurrentScope());
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resetCallerToken();
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}
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private static final String truncate(String toTruncate) {
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return toTruncate==null?toTruncate:toTruncate.substring(0, toTruncate.length()/2)+"...";
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}
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private String callerToken=null;
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private void setTargetToken() {
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if(callerToken==null) {
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callerToken=TokenSetter.getCurrentToken();
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log.trace("Storing caller token {}. Target Token is {}",truncate(callerToken),truncate(targetToken));
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TokenSetter.setToken(targetToken);
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}else {
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log.trace("Caller token {} already registered. Target Token is {}",truncate(callerToken),truncate(targetToken));
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}
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}
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private void resetCallerToken() {
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if(callerToken!=null) {
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log.trace("Resetting caller token {}. Target Token is {}, current is {} ",truncate(callerToken),truncate(targetToken),truncate(TokenSetter.getCurrentToken()));
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TokenSetter.setToken(callerToken);
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callerToken=null;
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}else log.trace("Caller token {} already reset [current token {}]. Target Token is {}",truncate(callerToken),truncate(TokenSetter.getCurrentToken()),truncate(targetToken));
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}
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public final ThreddsInfo getThreddsInfo() {
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setTargetToken();
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try{
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String infoPath="https://"+hostname+"/data-transfer-service/gcube/service/Capabilities/pluginInfo/REGISTER_CATALOG";;
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log.info("Loading thredds info from {} ",infoPath);
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WebTarget target=getWebClient().target(infoPath);
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return target.request(MediaType.APPLICATION_JSON).get(ThreddsInfo.class);
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}finally {
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resetCallerToken();
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}
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}
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public void lockFolder(String processId) throws UnableToLockException {
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setTargetToken();
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PrintWriter writer=null;
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File temp=null;
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try{
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log.info("Locking remote path {} to processId {} ",operatingPath,processId);
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DataTransferClient cl=getDTClient(hostname);
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Destination dest=new Destination();
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dest.setCreateSubfolders(true);
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dest.setOnExistingFileName(DestinationClashPolicy.FAIL);
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dest.setOnExistingSubFolder(DestinationClashPolicy.APPEND);
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dest.setPersistenceId(Constants.THREDDS_PERSISTENCE);
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dest.setSubFolder(operatingPath);
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dest.setDestinationFileName(Constants.LOCK_FILE);
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temp=File.createTempFile("tmp_lock", ".tmp");
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writer=new PrintWriter(temp);
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writer.write(processId);
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writer.flush();
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writer.close();
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cl.localFile(temp, dest);
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}catch(Throwable t) {
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throw new UnableToLockException("Unable to lock "+operatingPath,t);
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}finally {
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if(writer!=null) IOUtils.closeQuietly(writer);
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if(temp!=null)try {
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Files.deleteIfExists(temp.toPath());
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}catch(IOException e) {
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log.warn("Unable to delete temp file {} ",temp.getAbsolutePath(),e);
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}
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resetCallerToken();
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}
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}
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public void deleteThreddsFile(String location) throws RemoteFileNotFoundException {
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setTargetToken();
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String urlString="http://"+hostname+":80/"+Constants.THREDDS_DATA_TRANSFER_BASE_URL+getPathFromStartingLocation(location);
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log.info("Deleting file at {} ",urlString);
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try{
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getWebClient().target(urlString).request().delete();
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}catch(Throwable t) {
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throw new RemoteFileNotFoundException("Unable to access "+urlString, t);
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}finally{
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resetCallerToken();
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}
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}
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public boolean existsThreddsFile(String location) {
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try{
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getFileDescriptor(location);
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return true;
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}catch(RemoteFileNotFoundException e) {
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return false;
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}
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}
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public String readThreddsFile(String location) throws RemoteFileNotFoundException {
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setTargetToken();
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String urlString="http://"+hostname+":80/"+Constants.THREDDS_DATA_TRANSFER_BASE_URL+getPathFromStartingLocation(location);
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log.info("Reading file at {} ",urlString);
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try{
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return getWebClient().target(urlString).request().get().readEntity(String.class);
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}catch(Throwable t) {
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throw new RemoteFileNotFoundException("Unable to access "+urlString, t);
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}finally {
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resetCallerToken();
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}
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}
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public void createEmptyFolder(String targetPath) throws InternalException {
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setTargetToken();
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String toCleanPath=getPathFromStartingLocation(targetPath);
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try{
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log.info("Cleaning up {} on {} ",toCleanPath,hostname);
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DataTransferClient client=getDTClient(hostname);
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File toTransfer=File.createTempFile("clean", ".dt_temp");
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toTransfer.createNewFile();
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Destination dest=new Destination();
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dest.setCreateSubfolders(true);
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dest.setOnExistingFileName(DestinationClashPolicy.REWRITE);
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dest.setOnExistingSubFolder(DestinationClashPolicy.REWRITE);
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dest.setPersistenceId(Constants.THREDDS_PERSISTENCE);
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dest.setSubFolder(toCleanPath);
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dest.setDestinationFileName(toTransfer.getName());
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log.info("Going to cleanup remote folder {} on {} ",dest.getSubFolder(),hostname);
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client.localFile(toTransfer, dest);
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this.deleteThreddsFile(targetPath+"/"+toTransfer.getName());
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log.info("Done");
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log.debug("Resulting folder descriptor : {} ",getFileDescriptor(targetPath));
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}catch(Exception e) {
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log.error("Unable to delete remote folder "+toCleanPath,e);
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throw new InternalException("Unable to cleanup remote folder.");
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}finally {
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resetCallerToken();
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}
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}
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public ThreddsCatalog createCatalog(String name) throws InternalException {
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setTargetToken();
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try{
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log.info("Creating catalog with name {} for path {} ",name,operatingPath);
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String sdiUrl="http://"+getSDIServiceHost()+"/"+Constants.SDI_THREDDS_BASE_URL;
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Response resp=getWebClient().target(sdiUrl).
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queryParam("name", name).
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queryParam("path", operatingPath).
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queryParam("folder", operatingPath).request().put(null);
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if(!(resp.getStatus()>=200&&resp.getStatus()<300))
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throw new InternalException("Failed catalog registration on SDI Service. Message "+resp.readEntity(String.class));
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return getCatalog();
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}catch(Throwable t) {
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log.error("Unable to create catalog",t);
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throw new InternalException("Unable to create catalog",t);
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}finally {
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resetCallerToken();
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}
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}
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public ThreddsCatalog getCatalog() {
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setTargetToken();
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try{ThreddsInfo info=getThreddsInfo();
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String instanceBasePath=info.getLocalBasePath();
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return info.getCatalogByFittingLocation(instanceBasePath+"/"+operatingPath);
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}finally {
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resetCallerToken();
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}
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}
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public RemoteFileDescriptor getFileDescriptor() throws RemoteFileNotFoundException {
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return getFileDescriptor(null);
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}
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public RemoteFileDescriptor getFileDescriptor(String path) throws RemoteFileNotFoundException {
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setTargetToken();
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String urlString="http://"+hostname+":80/"+Constants.THREDDS_DATA_TRANSFER_BASE_URL+getPathFromStartingLocation(path);
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log.info("Reading file at {} ",urlString);
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try{
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return getWebClient().target(urlString).queryParam("descriptor", true).request().get().readEntity(RemoteFileDescriptor.class);
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}catch(Throwable t) {
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throw new RemoteFileNotFoundException("Unable to access "+urlString, t);
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}finally {
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resetCallerToken();
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}
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}
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public InputStream getInputStream(String path) throws RemoteFileNotFoundException {
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setTargetToken();
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String urlString="http://"+hostname+":80/"+Constants.THREDDS_DATA_TRANSFER_BASE_URL+getPathFromStartingLocation(path);
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log.info("Reading file at {} ",urlString);
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try{
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return getWebClient().target(urlString).request().get().readEntity(InputStream.class);
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}catch(Throwable t) {
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throw new RemoteFileNotFoundException("Unable to access "+urlString, t);
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}finally {
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resetCallerToken();
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}
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}
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public TransferResult transferFile(Destination dest,String url,Set<PluginInvocation> invocations) throws InvalidSourceException, SourceNotSetException, FailedTransferException, InitializationException, InvalidDestinationException, DestinationNotSetException {
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setTargetToken();
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try{DataTransferClient client=getDTClient(hostname);
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if(invocations!=null&&!invocations.isEmpty())
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return client.httpSource(url, dest,invocations);
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else return client.httpSource(url, dest);
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}finally {
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resetCallerToken();
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}
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}
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private String getPathFromStartingLocation(String location) {
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if(location!=null&&location.length()>0)return operatingPath+"/"+location;
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else return operatingPath;
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}
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private static String getSDIServiceHost(){
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return getGCoreEndpointHostname(ServiceConstants.SERVICE_CLASS, ServiceConstants.SERVICE_NAME);
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}
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private static String getThreddsHost(){
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return getGCoreEndpointHostname(ServiceConstants.SERVICE_CLASS, "Thredds");
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}
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private static String getGCoreEndpointHostname(String serviceClass,String serviceName) {
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SimpleQuery query =queryFor(GCoreEndpoint.class);
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query.addCondition("$resource/Profile/ServiceClass/text() eq '"+serviceClass+"'")
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.addCondition("$resource/Profile/ServiceName/text() eq '"+serviceName+"'");
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// .setResult("$resource/Profile/AccessPoint");
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DiscoveryClient<GCoreEndpoint> client = clientFor(GCoreEndpoint.class);
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GCoreEndpoint endpoint= client.submit(query).get(0);
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return endpoint.profile().endpoints().iterator().next().uri().getHost();
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}
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private static Client getWebClient() {
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return ClientBuilder.newClient(new ClientConfig().register(AuthorizationFilter.class))
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.property(ClientProperties.SUPPRESS_HTTP_COMPLIANCE_VALIDATION, true);
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}
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private static DataTransferClient getDTClient(String threddsHostName) throws UnreachableNodeException, ServiceNotFoundException {
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log.debug("Getting DT Client for {} ",threddsHostName);
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return DataTransferClient.getInstanceByEndpoint("http://"+threddsHostName+":80");
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}
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}
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