Java Code Examples for org.elasticsearch.action.get.GetRequestBuilder#putHeader()

The following examples show how to use org.elasticsearch.action.get.GetRequestBuilder#putHeader() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: FetchElasticsearch.java    From localization_nifi with Apache License 2.0 4 votes vote down vote up 
@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {

    FlowFile flowFile = session.get();
    if (flowFile == null) {
        return;
    }

    final String index = context.getProperty(INDEX).evaluateAttributeExpressions(flowFile).getValue();
    final String docId = context.getProperty(DOC_ID).evaluateAttributeExpressions(flowFile).getValue();
    final String docType = context.getProperty(TYPE).evaluateAttributeExpressions(flowFile).getValue();
    final Charset charset = Charset.forName(context.getProperty(CHARSET).evaluateAttributeExpressions(flowFile).getValue());

    final ComponentLog logger = getLogger();
    try {

        logger.debug("Fetching {}/{}/{} from Elasticsearch", new Object[]{index, docType, docId});
        final long startNanos = System.nanoTime();

        GetRequestBuilder getRequestBuilder = esClient.get().prepareGet(index, docType, docId);
        if (authToken != null) {
            getRequestBuilder.putHeader("Authorization", authToken);
        }
        final GetResponse getResponse = getRequestBuilder.execute().actionGet();

        if (getResponse == null || !getResponse.isExists()) {
            logger.warn("Failed to read {}/{}/{} from Elasticsearch: Document not found",
                    new Object[]{index, docType, docId});

            // We couldn't find the document, so penalize it and send it to "not found"
            flowFile = session.penalize(flowFile);
            session.transfer(flowFile, REL_NOT_FOUND);
        } else {
            flowFile = session.putAttribute(flowFile, "filename", docId);
            flowFile = session.putAttribute(flowFile, "es.index", index);
            flowFile = session.putAttribute(flowFile, "es.type", docType);
            flowFile = session.write(flowFile, new OutputStreamCallback() {
                @Override
                public void process(OutputStream out) throws IOException {
                    out.write(getResponse.getSourceAsString().getBytes(charset));
                }
            });
            logger.debug("Elasticsearch document " + docId + " fetched, routing to success");

            final long millis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNanos);
            final String uri = context.getProperty(HOSTS).evaluateAttributeExpressions().getValue() + "/" + index + "/" + docType + "/" + docId;
            session.getProvenanceReporter().fetch(flowFile, uri, millis);
            session.transfer(flowFile, REL_SUCCESS);
        }
    } catch (NoNodeAvailableException
            | ElasticsearchTimeoutException
            | ReceiveTimeoutTransportException
            | NodeClosedException exceptionToRetry) {
        logger.error("Failed to read into Elasticsearch due to {}, this may indicate an error in configuration "
                        + "(hosts, username/password, etc.). Routing to retry",
                new Object[]{exceptionToRetry.getLocalizedMessage()}, exceptionToRetry);
        session.transfer(flowFile, REL_RETRY);
        context.yield();

    } catch (Exception e) {
        logger.error("Failed to read {} from Elasticsearch due to {}", new Object[]{flowFile, e.getLocalizedMessage()}, e);
        session.transfer(flowFile, REL_FAILURE);
        context.yield();
    }
}
Example 2
Source File: FetchElasticsearch.java    From nifi with Apache License 2.0 4 votes vote down vote up 
@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {

    FlowFile flowFile = session.get();
    if (flowFile == null) {
        return;
    }

    final String index = context.getProperty(INDEX).evaluateAttributeExpressions(flowFile).getValue();
    final String docId = context.getProperty(DOC_ID).evaluateAttributeExpressions(flowFile).getValue();
    final String docType = context.getProperty(TYPE).evaluateAttributeExpressions(flowFile).getValue();
    final Charset charset = Charset.forName(context.getProperty(CHARSET).evaluateAttributeExpressions(flowFile).getValue());

    final ComponentLog logger = getLogger();
    try {

        logger.debug("Fetching {}/{}/{} from Elasticsearch", new Object[]{index, docType, docId});
        final long startNanos = System.nanoTime();

        GetRequestBuilder getRequestBuilder = esClient.get().prepareGet(index, docType, docId);
        if (authToken != null) {
            getRequestBuilder.putHeader("Authorization", authToken);
        }
        final GetResponse getResponse = getRequestBuilder.execute().actionGet();

        if (getResponse == null || !getResponse.isExists()) {
            logger.debug("Failed to read {}/{}/{} from Elasticsearch: Document not found",
                    new Object[]{index, docType, docId});

            // We couldn't find the document, so penalize it and send it to "not found"
            flowFile = session.penalize(flowFile);
            session.transfer(flowFile, REL_NOT_FOUND);
        } else {
            flowFile = session.putAttribute(flowFile, "filename", docId);
            flowFile = session.putAttribute(flowFile, "es.index", index);
            flowFile = session.putAttribute(flowFile, "es.type", docType);
            flowFile = session.write(flowFile, new OutputStreamCallback() {
                @Override
                public void process(OutputStream out) throws IOException {
                    out.write(getResponse.getSourceAsString().getBytes(charset));
                }
            });
            logger.debug("Elasticsearch document " + docId + " fetched, routing to success");

            final long millis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNanos);
            final String uri = context.getProperty(HOSTS).evaluateAttributeExpressions().getValue() + "/" + index + "/" + docType + "/" + docId;
            session.getProvenanceReporter().fetch(flowFile, uri, millis);
            session.transfer(flowFile, REL_SUCCESS);
        }
    } catch (NoNodeAvailableException
            | ElasticsearchTimeoutException
            | ReceiveTimeoutTransportException
            | NodeClosedException exceptionToRetry) {
        logger.error("Failed to read into Elasticsearch due to {}, this may indicate an error in configuration "
                        + "(hosts, username/password, etc.). Routing to retry",
                new Object[]{exceptionToRetry.getLocalizedMessage()}, exceptionToRetry);
        session.transfer(flowFile, REL_RETRY);
        context.yield();

    } catch (Exception e) {
        logger.error("Failed to read {} from Elasticsearch due to {}", new Object[]{flowFile, e.getLocalizedMessage()}, e);
        session.transfer(flowFile, REL_FAILURE);
        context.yield();
    }
}