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132 lines
5.5 KiB
Java
132 lines
5.5 KiB
Java
/**
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*
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*/
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package org.gcube.contentmanagement.blobstorage.transport.backend.operation;
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import java.net.UnknownHostException;
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import org.bson.types.ObjectId;
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import org.gcube.contentmanagement.blobstorage.resource.MemoryType;
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import org.gcube.contentmanagement.blobstorage.resource.MyFile;
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import org.gcube.contentmanagement.blobstorage.resource.OperationDefinition.OPERATION;
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import org.gcube.contentmanagement.blobstorage.resource.OperationDefinition.REMOTE_RESOURCE;
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import org.gcube.contentmanagement.blobstorage.service.operation.Link;
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import org.gcube.contentmanagement.blobstorage.service.operation.Monitor;
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import org.gcube.contentmanagement.blobstorage.service.operation.Operation;
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import org.gcube.contentmanagement.blobstorage.transport.backend.MongoIOManager;
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import org.gcube.contentmanagement.blobstorage.transport.backend.util.Costants;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.mongodb.gridfs.GridFSDBFile;
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import com.mongodb.gridfs.GridFSInputFile;
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/**
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* @author Roberto Cirillo (ISTI-CNR) 2018
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*
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*/
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public class LinkOperator extends Link {
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Logger logger=LoggerFactory.getLogger(LinkOperator.class);
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/**
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* @param server
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* @param user
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* @param pwd
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* @param bucket
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* @param monitor
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* @param isChunk
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* @param backendType
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* @param dbs
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*/
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public LinkOperator(String[] server, String user, String pwd, String bucket, Monitor monitor, boolean isChunk,
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String backendType, String[] dbs) {
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super(server, user, pwd, bucket, monitor, isChunk, backendType, dbs);
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// TODO Auto-generated constructor stub
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}
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/* (non-Javadoc)
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* @see org.gcube.contentmanagement.blobstorage.service.operation.Link#execute(org.gcube.contentmanagement.blobstorage.transport.backend.MongoIO, org.gcube.contentmanagement.blobstorage.transport.backend.MongoIO, org.gcube.contentmanagement.blobstorage.resource.MyFile, java.lang.String)
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*/
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@Override
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public String execute(MongoIOManager mongoPrimaryInstance, MongoIOManager mongoSecondaryInstance, MyFile resource, String sourcePath, String destinationPath) throws UnknownHostException {
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boolean replace=true;
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String source=sourcePath;
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String destination=destinationPath;
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String dir=resource.getRemoteDir();
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String name=resource.getName();
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REMOTE_RESOURCE remoteResourceIdentifier=resource.getOperation().getRemoteResource();
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String destinationId=null;
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String sourceId=null;
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logger.debug("link operation on Mongo backend, parameters: source path: "+source+" destination path: "+destination);
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if((source != null) && (!source.isEmpty()) && (destination != null) && (!destination.isEmpty())){
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GridFSDBFile f = mongoPrimaryInstance.retrieveRemoteDescriptor(source, remoteResourceIdentifier, false);
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if(f != null){
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int count=1;
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if((f.containsField(Costants.COUNT_IDENTIFIER)) && ((f.get(Costants.COUNT_IDENTIFIER) != null))){
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count=(Integer)f.get(Costants.COUNT_IDENTIFIER);
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count++;
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}
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f.put(Costants.COUNT_IDENTIFIER, count);
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mongoPrimaryInstance.updateCommonFields(f, resource, OPERATION.LINK);
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sourceId=f.getId().toString();
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f.save();
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}else{
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mongoPrimaryInstance.close();
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throw new IllegalArgumentException(" source remote file not found at: "+source);
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}
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// check if the destination file exists
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// GridFSDBFile fold = gfs.findOne(destinationPath);
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GridFSDBFile fold = mongoPrimaryInstance.retrieveRemoteDescriptor(destinationPath, remoteResourceIdentifier, false);
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if(fold != null){
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String oldir=(String)fold.get("dir");
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if(logger.isDebugEnabled())
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logger.debug("old dir found "+oldir);
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if((oldir.equalsIgnoreCase(((MyFile)resource).getRemoteDir()))){
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ObjectId oldId=(ObjectId) fold.getId();
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if(!replace){
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return oldId.toString();
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}else{
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if(logger.isDebugEnabled())
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logger.debug("remove id: "+oldId);
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String lock=(String)fold.get("lock");
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//check if the od file is locked
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if((lock !=null) && (!lock.isEmpty()) && (!mongoPrimaryInstance.isTTLUnlocked(fold))){
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mongoPrimaryInstance.close();
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throw new IllegalAccessError("The file is locked");
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}else{
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//remove old file
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mongoPrimaryInstance.removeGFSFile(fold, oldId);
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}
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}
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}
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}
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// create destination file
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GridFSInputFile destinationFile=null;
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//create new file
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byte[] data=new byte[1];
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if (resource.getGcubeMemoryType()== MemoryType.VOLATILE){
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destinationFile = mongoPrimaryInstance.createGFSFileObject(data);//gfs.createFile(data);
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}else{
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destinationFile = mongoPrimaryInstance.createGFSFileObject(data, resource.getWriteConcern(), resource.getReadPreference());//gfs.createFile(data);
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}
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if(logger.isDebugEnabled())
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logger.debug("Directory: "+dir);
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mongoPrimaryInstance.setGenericProperties(resource, destinationPath, dir,
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destinationFile, name);
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destinationFile.put(Costants.LINK_IDENTIFIER, sourceId);
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destinationId=destinationFile.getId().toString();
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if(logger.isDebugEnabled())
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logger.debug("ObjectId: "+destinationId);
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mongoPrimaryInstance.buildDirTree(mongoPrimaryInstance.getMetaDataCollection(null), dir);
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destinationFile.save();
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mongoPrimaryInstance.close();
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}else{
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mongoPrimaryInstance.close();
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throw new IllegalArgumentException(" invalid argument: source: "+source+" dest: "+destination+" the values must be not null and not empty");
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}
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return destinationId.toString();
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}
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}
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