FetpapiClientUsingFesapi.java

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package com.f2i_consulting.fetpapi.client;

import java.util.Optional;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import com.f2i_consulting.fesapi.SWIGTYPE_p_double;
import com.f2i_consulting.fesapi.fesapi;
import com.f2i_consulting.fesapi.common.DataObjectRepository;
import com.f2i_consulting.fesapi.resqml2.AbstractValuesProperty;
import com.f2i_consulting.fesapi.resqml2.IjkGridExplicitRepresentation;
import com.f2i_consulting.fetpapi.DataspaceVector;
import com.f2i_consulting.fetpapi.MapStringDataObject;
import com.f2i_consulting.fetpapi.MapStringString;
import com.f2i_consulting.fetpapi.ResourceVector;
import com.f2i_consulting.fetpapi.fetpapi;
import com.f2i_consulting.fetpapi.Energistics.Etp.v12.Datatypes.Object.ContextInfo;
import com.f2i_consulting.fetpapi.Energistics.Etp.v12.Datatypes.Object.ContextScopeKind;
import com.f2i_consulting.fetpapi.Energistics.Etp.v12.Datatypes.Object.DataObject;
import com.f2i_consulting.fetpapi.Energistics.Etp.v12.Datatypes.Object.Dataspace;
import com.f2i_consulting.fetpapi.Energistics.Etp.v12.Datatypes.Object.Resource;
import com.f2i_consulting.fetpapi.etp.ClientSession;
import com.f2i_consulting.fetpapi.etp.CoreHandlers;
import com.f2i_consulting.fetpapi.etp.DataArrayHandlers;
import com.f2i_consulting.fetpapi.etp.DataspaceHandlers;
import com.f2i_consulting.fetpapi.etp.DiscoveryHandlers;
import com.f2i_consulting.fetpapi.etp.FesapiHdfProxyFactory;
import com.f2i_consulting.fetpapi.etp.InitializationParameters;
import com.f2i_consulting.fetpapi.etp.StoreHandlers;

public class FetpapiClientUsingFesapi {

	/**
	 * Loading the FesapiCpp and Fetpapi native libraries
	 */
	static {
		try {
			System.loadLibrary("${FESAPI_ASSEMBLY_NAME}");
		}
		catch (UnsatisfiedLinkError e) {
			System.out.println("UnsatisfiedLinkError : " + e.toString());
		}
		try {
			System.loadLibrary("${ASSEMBLY_NAME}");
		}
		catch (UnsatisfiedLinkError e) {
			System.out.println("UnsatisfiedLinkError : " + e.toString());
		}
	}

	public static void main(String[] args) {
		// Read arguments of the command line
		String serverUrl = "ws://etp.f2i-consulting.com:9002/";
		String authorization = "";
		
		if (args.length < 1) {
			System.out.println("Program arguments should be : serverUrl \"<BearerOrBasic> <token>\"");
			System.out.println("WARNING : you did not provide a server URL. The URL will be defaulted to ws://etp.f2i-consulting.com:9002/");
		}
		else {
			serverUrl = args[0];
			if (args.length < 2) {
				System.out.println("Program arguments should be : serverUrl \"Bearer <token>\"");
				System.out.println("WARNING : You did not provide any authorizaton after the URL. Please see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization for further details");
			}
			else {
				if (!args[1].startsWith("Basic ") && !args[1].startsWith("Bearer ")) {
					System.out.println("WARNING : HTTP authorization \"" + args[3] + "\" field does not start with \"Basic \" nor \"Bearer \" which is unlikely");
				}
				authorization = args[1];
			}
		}
		
		// Create a DataObjectRepository in order to store retrieved dataobjects from the ETP server
		try (DataObjectRepository repo = new DataObjectRepository()) {
			repo.setDefaultStandard(DataObjectRepository.EnergisticsStandard.RESQML2_0_1);
			repo.setDefaultStandard(DataObjectRepository.EnergisticsStandard.EML2_0);

			// ****** Connect to ETP server through clientSession ******
			String instanceUuid = UUID.randomUUID().toString(); 
			InitializationParameters initializationParams = new InitializationParameters(instanceUuid, serverUrl);
			MapStringString additionalHeaderField = new MapStringString();
			additionalHeaderField.put("data-partition-id", "osdu"); // Example for OSDU RDDMS
			initializationParams.setAdditionalHandshakeHeaderFields(additionalHeaderField);
			
			ClientSession clientSession = fetpapi.createClientSession(initializationParams, authorization);
			clientSession.setCoreProtocolHandlers(new CoreHandlers(clientSession));
			clientSession.setDataspaceProtocolHandlers(new DataspaceHandlers(clientSession));
			clientSession.setDiscoveryProtocolHandlers(new DiscoveryHandlers(clientSession));
			clientSession.setStoreProtocolHandlers(new StoreHandlers(clientSession));
			clientSession.setDataArrayProtocolHandlers(new DataArrayHandlers(clientSession));
			new Thread(clientSession::run).start();
			long start = System.currentTimeMillis();
			while (clientSession.isEtpSessionClosed() && System.currentTimeMillis() - start < 5000) {
				TimeUnit.MILLISECONDS.sleep(1);
			}			
			if (clientSession.isEtpSessionClosed()) {
				System.err.println("The ETP session cound not be establisehd in 5 seconds.");
				return;
			}
			System.out.println("Now connected to ETP Server");
			// ****** We are now connected to ETP server through clientSession ******
			// Set the HDF proxy factory in order to use one compliant with ETP
			repo.setHdfProxyFactory(new FesapiHdfProxyFactory(clientSession));
	
			// ****** Get a dataspace content. This corresponds to getting the content of an EPC file ******
			// Find an available ETP dataspace
			DataspaceVector allDataspaces = clientSession.getDataspaces();
			Optional<Dataspace> dataspace = allDataspaces.stream().findAny();		
			if (dataspace.isEmpty()) {
				clientSession.close();
				System.err.println("The ETP server has no dataspace.");
				return;
			}
			System.out.println("Working on dataspace " + dataspace.get().getUri());
			// List resources of this ETP dataspace
			ContextInfo etpContext = new ContextInfo();
			etpContext.setUri(dataspace.get().getUri());
			etpContext.setDepth(1);
			ResourceVector allResources = clientSession.getResources(etpContext, ContextScopeKind.self);
			if (allResources.isEmpty()) {
				clientSession.close();
				System.err.println("The ETP dataspace has no resource.");
				return;
			}
			// Get dataobjects from the resources to the DataObjectRepository
			MapStringString uriMap = new MapStringString();
			long index = 0;
			for (Resource resource : allResources) {
				uriMap.put(Long.toString(index++), resource.getUri());
			}
			MapStringDataObject allDataObjects = clientSession.getDataObjects(uriMap);
			for (DataObject dataObject : allDataObjects.values()) {
				repo.addOrReplaceGsoapProxy(dataObject.getData(), fetpapi.getDataObjectType(dataObject.getResource().getUri()), fetpapi.getDataspaceUri(dataObject.getResource().getUri()));
			}
			// ****** We have now in the DataObjectRepository the same content as if we would have deserialized and EPC file looking like the dataspace ******
			
			// ****** Use the DataObjectRepository exactly as you are used to do with FESAPI ******
			if (repo.getIjkGridRepresentationCount() > 0) {
				IjkGridExplicitRepresentation ijkGrid = repo.getIjkGridExplicitRepresentation(0);
				ijkGrid.loadSplitInformation();
				long originIndex = ijkGrid.getXyzPointIndexFromCellCorner(0, 0, 0, 0);
				System.out.println("The index of the grid origin in XYZ points is : " + originIndex);
				ijkGrid.unloadSplitInformation();
				if (ijkGrid.getValuesPropertyCount() > 0) {
					AbstractValuesProperty prop = ijkGrid.getValuesProperty(0);
					SWIGTYPE_p_double propValues = fesapi.new_DoubleArray(prop.getValuesCountOfPatch(0));
					try {
						prop.getDoubleValuesOfPatch(0, propValues);
						System.out.println("The first cell value of prop " + prop.getTitle() + " is " + fesapi.DoubleArray_getitem(propValues, 0));
					}
					finally {
						fesapi.delete_DoubleArray(propValues);
					}
				}
			}
			else {
				System.out.println("This dataspace has no IJK Grid");
			}
			
			// Do not forget to close session once you have processed all the dataobject repository.
			System.out.println("Closing the session...");
			clientSession.close();			
		} catch (InterruptedException e) {
			e.printStackTrace();
		}

		System.out.println("FINISHED");
	}
}