Examples with WriterDataSupplier org.talend.components.api.component.runtime.WriterDataSupplier used on opensource projects

Example 1 with WriterDataSupplier

use of org.talend.components.api.component.runtime.WriterDataSupplier in project components by Talend.

the class RuntimeControllerImpl method writeData.

@Override
public void writeData(InputStream rawPayload) throws IOException {
    // 1) Read payload (with data as a stream of course)
    DatasetWritePayload payload = DatasetWritePayload.readData(rawPayload, mapper);
    String definitionName = payload.getConfiguration().getDefinitionName();
    // 2) Create properties
    Properties properties = propertiesHelpers.propertiesFromDto(payload.getConfiguration());
    if (properties instanceof ComponentProperties) {
        ComponentProperties componentProperties = (ComponentProperties) properties;
        // 3) Retrieve component definition to be able to create the runtime
        final ComponentDefinition definition = propertiesHelpers.getDefinition(ComponentDefinition.class, definitionName);
        // 4) Get the execution engine
        ExecutionEngine executionEngine;
        if (definition.isSupportingExecutionEngines(DI)) {
            executionEngine = DI;
            // 5) Create the sandbox
            try (SandboxedInstance instance = RuntimeUtil.createRuntimeClass(definition.getRuntimeInfo(executionEngine, componentProperties, INCOMING), definition.getClass().getClassLoader())) {
                Sink datasetRuntimeInstance = (Sink) instance.getInstance();
                datasetRuntimeInstance.initialize(null, componentProperties);
                Iterator<IndexedRecord> data = payload.getData();
                WriteOperation writeOperation = datasetRuntimeInstance.createWriteOperation();
                // Supplier return null to signify end of data stream => see WriterDataSupplier.writeData
                WriterDataSupplier<?, IndexedRecord> stringWriterDataSupplier = new WriterDataSupplier<Object, IndexedRecord>(writeOperation, () -> data.hasNext() ? data.next() : null, null);
                stringWriterDataSupplier.writeData();
            }
        } else if (definition.isSupportingExecutionEngines(BEAM)) {
            throw new UnsupportedOperationException("Beam runtime is not available for dataset write through HTTP API.");
        } else {
            throw new TalendRuntimeException(CommonErrorCodes.UNREGISTERED_DEFINITION);
        }
    } else if (properties instanceof DatasetProperties) {
        throw new UnsupportedOperationException("HTTP API is only able to write using component implementations. Not " + properties.getClass());
    }
}