Example usage for org.apache.commons.lang3 StringUtils trimToEmpty

List of usage examples for org.apache.commons.lang3 StringUtils trimToEmpty

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Introduction

In this page you can find the example usage for org.apache.commons.lang3 StringUtils trimToEmpty.

Prototype

public static String trimToEmpty(final String str)

Source Link

Document

Removes control characters (char <= 32) from both ends of this String returning an empty String ("") if the String is empty ("") after the trim or if it is null .

Usage

From source file:org.apache.metron.stellar.common.shell.StellarShell.java

/**
 * Handle a magic '%define var=value'.  Alter the global configuration.
 * @param expression The expression passed to %define
 *//*from w  w  w . j a  va  2  s  .  c  om*/
public void handleMagicDefine(String expression) {

    // grab the expression in '%define <assign-expression>'
    String assignExpr = StringUtils.trimToEmpty(expression.substring(MAGIC_DEFINE.length()));
    if (assignExpr.length() > 0) {

        // the expression must be an assignment
        if (StellarAssignment.isAssignment(assignExpr)) {
            StellarAssignment expr = StellarAssignment.from(assignExpr);

            // execute the expression
            Object result = executor.execute(expr.getStatement());
            if (result != null) {
                writeLine(result.toString());

                // alter the global configuration
                getOrCreateGlobalConfig(executor).put(expr.getVariable(), result);
            }

        } else {
            // the expression is not an assignment.  boo!
            writeLine(ERROR_PROMPT + MAGIC_DEFINE + " expected assignment expression");
        }
    }
}

From source file:org.apache.nifi.processors.aws.AbstractAWSProcessor.java

protected void initializeRegionAndEndpoint(ProcessContext context) {
    // if the processor supports REGION, get the configured region.
    if (getSupportedPropertyDescriptors().contains(REGION)) {
        final String region = context.getProperty(REGION).getValue();
        if (region != null) {
            this.region = Region.getRegion(Regions.fromName(region));
            client.setRegion(this.region);
        } else {//from  ww w  .ja  v  a  2s.  c  o m
            this.region = null;
        }
    }

    // if the endpoint override has been configured, set the endpoint.
    // (per Amazon docs this should only be configured at client creation)
    final String urlstr = StringUtils.trimToEmpty(context.getProperty(ENDPOINT_OVERRIDE).getValue());
    if (!urlstr.isEmpty()) {
        this.client.setEndpoint(urlstr);
    }

}

From source file:org.apache.nifi.processors.aws.s3.AbstractS3Processor.java

private void initalizeEndpointOverride(final ProcessContext context, final AmazonS3Client s3) {
    // if ENDPOINT_OVERRIDE is set, use PathStyleAccess
    if (StringUtils.trimToEmpty(context.getProperty(ENDPOINT_OVERRIDE).getValue()).isEmpty() == false) {
        final S3ClientOptions s3Options = new S3ClientOptions();
        s3Options.setPathStyleAccess(true);
        s3.setS3ClientOptions(s3Options);
    }//  w ww . jav a2  s.  c  o  m
}

From source file:org.apache.nifi.processors.aws.wag.AbstractAWSGatewayApiProcessor.java

@Override
public void onPropertyModified(final PropertyDescriptor descriptor, final String oldValue,
        final String newValue) {
    if (descriptor.isDynamic()) {
        final Set<String> newDynamicPropertyNames = new HashSet<>(dynamicPropertyNames);
        if (newValue == null) {
            newDynamicPropertyNames.remove(descriptor.getName());
        } else if (oldValue == null) { // new property
            newDynamicPropertyNames.add(descriptor.getName());
        }/*from  w  w  w .  ja  va2s.  c  om*/
        this.dynamicPropertyNames = Collections.unmodifiableSet(newDynamicPropertyNames);
    } else {
        // compile the attributes-to-send filter pattern
        if (PROP_ATTRIBUTES_TO_SEND.getName().equalsIgnoreCase(descriptor.getName())) {
            if (newValue == null || newValue.isEmpty()) {
                regexAttributesToSend = null;
            } else {
                final String trimmedValue = StringUtils.trimToEmpty(newValue);
                regexAttributesToSend = Pattern.compile(trimmedValue);
            }
        }
    }
}

From source file:org.apache.nifi.processors.elasticsearch.FetchElasticsearchHttp.java

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {

    FlowFile flowFile = null;/*from www.  ja va 2s.c  om*/
    if (context.hasIncomingConnection()) {
        flowFile = session.get();

        // If we have no FlowFile, and all incoming connections are self-loops then we can continue on.
        // However, if we have no FlowFile and we have connections coming from other Processors, then
        // we know that we should run only if we have a FlowFile.
        if (flowFile == null && context.hasNonLoopConnection()) {
            return;
        }
    }

    OkHttpClient okHttpClient = getClient();

    if (flowFile == null) {
        flowFile = session.create();
    }

    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 String fields = context.getProperty(FIELDS).isSet()
            ? context.getProperty(FIELDS).evaluateAttributeExpressions(flowFile).getValue()
            : null;

    // Authentication
    final String username = context.getProperty(USERNAME).evaluateAttributeExpressions(flowFile).getValue();
    final String password = context.getProperty(PASSWORD).evaluateAttributeExpressions().getValue();

    final ComponentLog logger = getLogger();

    Response getResponse = null;

    try {
        logger.debug("Fetching {}/{}/{} from Elasticsearch", new Object[] { index, docType, docId });

        // read the url property from the context
        final String urlstr = StringUtils
                .trimToEmpty(context.getProperty(ES_URL).evaluateAttributeExpressions().getValue());
        final URL url = buildRequestURL(urlstr, docId, index, docType, fields);
        final long startNanos = System.nanoTime();

        getResponse = sendRequestToElasticsearch(okHttpClient, url, username, password, "GET", null);
        final int statusCode = getResponse.code();

        if (isSuccess(statusCode)) {
            ResponseBody body = getResponse.body();
            final byte[] bodyBytes = body.bytes();
            JsonNode responseJson = parseJsonResponse(new ByteArrayInputStream(bodyBytes));
            boolean found = responseJson.get("found").asBoolean(false);
            String retrievedIndex = responseJson.get("_index").asText();
            String retrievedType = responseJson.get("_type").asText();
            String retrievedId = responseJson.get("_id").asText();

            if (found) {
                JsonNode source = responseJson.get("_source");
                flowFile = session.putAttribute(flowFile, "filename", retrievedId);
                flowFile = session.putAttribute(flowFile, "es.index", retrievedIndex);
                flowFile = session.putAttribute(flowFile, "es.type", retrievedType);
                if (source != null) {
                    flowFile = session.write(flowFile, out -> {
                        out.write(source.toString().getBytes());
                    });
                }
                logger.debug("Elasticsearch document " + retrievedId + " fetched, routing to success");

                // emit provenance event
                final long millis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNanos);
                if (context.hasNonLoopConnection()) {
                    session.getProvenanceReporter().fetch(flowFile, url.toExternalForm(), millis);
                } else {
                    session.getProvenanceReporter().receive(flowFile, url.toExternalForm(), millis);
                }
                session.transfer(flowFile, REL_SUCCESS);
            } else {
                logger.warn("Failed to read {}/{}/{} from Elasticsearch: Document not found",
                        new Object[] { index, docType, docId });

                // We couldn't find the document, so send it to "not found"
                session.transfer(flowFile, REL_NOT_FOUND);
            }
        } else {
            if (statusCode == 404) {
                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"
                session.transfer(flowFile, REL_NOT_FOUND);
            } else {
                // 5xx -> RETRY, but a server error might last a while, so yield
                if (statusCode / 100 == 5) {

                    logger.warn(
                            "Elasticsearch returned code {} with message {}, transferring flow file to retry. This is likely a server problem, yielding...",
                            new Object[] { statusCode, getResponse.message() });
                    session.transfer(flowFile, REL_RETRY);
                    context.yield();
                } else if (context.hasIncomingConnection()) { // 1xx, 3xx, 4xx -> NO RETRY
                    logger.warn(
                            "Elasticsearch returned code {} with message {}, transferring flow file to failure",
                            new Object[] { statusCode, getResponse.message() });
                    session.transfer(flowFile, REL_FAILURE);
                } else {
                    logger.warn("Elasticsearch returned code {} with message {}",
                            new Object[] { statusCode, getResponse.message() });
                    session.remove(flowFile);
                }
            }
        }
    } catch (IOException ioe) {
        logger.error(
                "Failed to read from Elasticsearch due to {}, this may indicate an error in configuration "
                        + "(hosts, username/password, etc.). Routing to retry",
                new Object[] { ioe.getLocalizedMessage() }, ioe);
        if (context.hasIncomingConnection()) {
            session.transfer(flowFile, REL_RETRY);
        } else {
            session.remove(flowFile);
        }
        context.yield();

    } catch (Exception e) {
        logger.error("Failed to read {} from Elasticsearch due to {}",
                new Object[] { flowFile, e.getLocalizedMessage() }, e);
        if (context.hasIncomingConnection()) {
            session.transfer(flowFile, REL_FAILURE);
        } else {
            session.remove(flowFile);
        }
        context.yield();
    } finally {
        if (getResponse != null) {
            getResponse.close();
        }
    }
}

From source file:org.apache.nifi.processors.elasticsearch.QueryElasticsearchHttp.java

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {

    FlowFile flowFile = null;/*  w w w .j av  a  2 s  .c  om*/
    if (context.hasIncomingConnection()) {
        flowFile = session.get();

        // If we have no FlowFile, and all incoming connections are self-loops then we can
        // continue on.
        // However, if we have no FlowFile and we have connections coming from other Processors,
        // then
        // we know that we should run only if we have a FlowFile.
        if (flowFile == null && context.hasNonLoopConnection()) {
            return;
        }
    }

    OkHttpClient okHttpClient = getClient();

    final String index = context.getProperty(INDEX).evaluateAttributeExpressions(flowFile).getValue();
    final String query = context.getProperty(QUERY).evaluateAttributeExpressions(flowFile).getValue();
    final String docType = context.getProperty(TYPE).evaluateAttributeExpressions(flowFile).getValue();
    final int pageSize = context.getProperty(PAGE_SIZE).evaluateAttributeExpressions(flowFile).asInteger()
            .intValue();
    final Integer limit = context.getProperty(LIMIT).isSet()
            ? context.getProperty(LIMIT).evaluateAttributeExpressions(flowFile).asInteger().intValue()
            : null;
    final String fields = context.getProperty(FIELDS).isSet()
            ? context.getProperty(FIELDS).evaluateAttributeExpressions(flowFile).getValue()
            : null;
    final String sort = context.getProperty(SORT).isSet()
            ? context.getProperty(SORT).evaluateAttributeExpressions(flowFile).getValue()
            : null;
    final boolean targetIsContent = context.getProperty(TARGET).getValue().equals(TARGET_FLOW_FILE_CONTENT);

    // Authentication
    final String username = context.getProperty(USERNAME).evaluateAttributeExpressions().getValue();
    final String password = context.getProperty(PASSWORD).evaluateAttributeExpressions().getValue();

    final ComponentLog logger = getLogger();

    int fromIndex = 0;
    int numResults;

    try {
        logger.debug("Querying {}/{} from Elasticsearch: {}", new Object[] { index, docType, query });

        final long startNanos = System.nanoTime();
        // read the url property from the context
        final String urlstr = StringUtils
                .trimToEmpty(context.getProperty(ES_URL).evaluateAttributeExpressions().getValue());

        boolean hitLimit = false;
        do {
            int mPageSize = pageSize;
            if (limit != null && limit <= (fromIndex + pageSize)) {
                mPageSize = limit - fromIndex;
                hitLimit = true;
            }

            final URL queryUrl = buildRequestURL(urlstr, query, index, docType, fields, sort, mPageSize,
                    fromIndex);

            final Response getResponse = sendRequestToElasticsearch(okHttpClient, queryUrl, username, password,
                    "GET", null);
            numResults = this.getPage(getResponse, queryUrl, context, session, flowFile, logger, startNanos,
                    targetIsContent);
            fromIndex += pageSize;
            getResponse.close();
        } while (numResults > 0 && !hitLimit);

        if (flowFile != null) {
            session.remove(flowFile);
        }
    } catch (IOException ioe) {
        logger.error(
                "Failed to read from Elasticsearch due to {}, this may indicate an error in configuration "
                        + "(hosts, username/password, etc.). Routing to retry",
                new Object[] { ioe.getLocalizedMessage() }, ioe);
        if (flowFile != null) {
            session.transfer(flowFile, REL_RETRY);
        }
        context.yield();

    } catch (RetryableException e) {
        logger.error(e.getMessage(), new Object[] { e.getLocalizedMessage() }, e);
        if (flowFile != null) {
            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);
        if (flowFile != null) {
            session.transfer(flowFile, REL_FAILURE);
        }
        context.yield();
    }
}

From source file:org.apache.nifi.processors.elasticsearch.ScrollElasticsearchHttp.java

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {

    try {/*from w w  w.  j a v  a  2 s  . co  m*/
        if (isQueryFinished(context.getStateManager())) {
            getLogger().trace("Query has been marked finished in the state manager.  "
                    + "To run another query, clear the state.");
            return;
        }
    } catch (IOException e) {
        throw new ProcessException("Could not retrieve state", e);
    }

    OkHttpClient okHttpClient = getClient();

    FlowFile flowFile = session.create();

    final String index = context.getProperty(INDEX).evaluateAttributeExpressions(flowFile).getValue();
    final String query = context.getProperty(QUERY).evaluateAttributeExpressions(flowFile).getValue();
    final String docType = context.getProperty(TYPE).evaluateAttributeExpressions(flowFile).getValue();
    final int pageSize = context.getProperty(PAGE_SIZE).evaluateAttributeExpressions(flowFile).asInteger()
            .intValue();
    final String fields = context.getProperty(FIELDS).isSet()
            ? context.getProperty(FIELDS).evaluateAttributeExpressions(flowFile).getValue()
            : null;
    final String sort = context.getProperty(SORT).isSet()
            ? context.getProperty(SORT).evaluateAttributeExpressions(flowFile).getValue()
            : null;
    final String scroll = context.getProperty(SCROLL_DURATION).isSet()
            ? context.getProperty(SCROLL_DURATION).evaluateAttributeExpressions(flowFile).getValue()
            : null;

    // Authentication
    final String username = context.getProperty(USERNAME).evaluateAttributeExpressions().getValue();
    final String password = context.getProperty(PASSWORD).evaluateAttributeExpressions().getValue();

    final ComponentLog logger = getLogger();

    try {
        String scrollId = loadScrollId(context.getStateManager());

        // read the url property from the context
        final String urlstr = StringUtils
                .trimToEmpty(context.getProperty(ES_URL).evaluateAttributeExpressions().getValue());
        if (scrollId != null) {
            final URL scrollurl = buildRequestURL(urlstr, query, index, docType, fields, sort, scrollId,
                    pageSize, scroll);
            final long startNanos = System.nanoTime();

            final Response getResponse = sendRequestToElasticsearch(okHttpClient, scrollurl, username, password,
                    "GET", null);
            this.getPage(getResponse, scrollurl, context, session, flowFile, logger, startNanos);
            getResponse.close();
        } else {
            logger.debug("Querying {}/{} from Elasticsearch: {}", new Object[] { index, docType, query });

            // read the url property from the context
            final URL queryUrl = buildRequestURL(urlstr, query, index, docType, fields, sort, scrollId,
                    pageSize, scroll);
            final long startNanos = System.nanoTime();

            final Response getResponse = sendRequestToElasticsearch(okHttpClient, queryUrl, username, password,
                    "GET", null);
            this.getPage(getResponse, queryUrl, context, session, flowFile, logger, startNanos);
            getResponse.close();
        }

    } catch (IOException ioe) {
        logger.error("Failed to read from Elasticsearch due to {}, this may indicate an error in configuration "
                + "(hosts, username/password, etc.).", new Object[] { ioe.getLocalizedMessage() }, ioe);
        session.remove(flowFile);
        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();
    }
}

From source file:org.apache.struts2.dispatcher.mapper.CompositeActionMapper.java

@Inject
public CompositeActionMapper(Container container,
        @Inject(value = StrutsConstants.STRUTS_MAPPER_COMPOSITE) String list) {
    String[] arr = StringUtils.split(StringUtils.trimToEmpty(list), ",");
    for (String name : arr) {
        Object obj = container.getInstance(ActionMapper.class, name);
        if (obj != null) {
            actionMappers.add((ActionMapper) obj);
        }//from w  ww . jav a 2  s . c o m
    }
}

From source file:org.apache.tika.parser.pdf.EnhancedPDFParser.java

private String getMatchGroup(Matcher m, int group) {
    return StringEscapeUtils.unescapeHtml4(StringUtils.trimToEmpty(m.group(group)));
}

From source file:org.bytesoft.bytejta.logging.SampleTransactionLogger.java

public File getDefaultDirectory() {
    String address = StringUtils.trimToEmpty(this.endpoint);
    File directory = new File(String.format("bytejta/%s", address.replaceAll("[^a-zA-Z0-9]", "_")));
    if (directory.exists() == false) {
        try {//from  www .  j  a v  a  2  s . c  o m
            directory.mkdirs();
        } catch (SecurityException ex) {
            logger.error("Error occurred while creating directory {}!", directory.getAbsolutePath(), ex);
        }
    }
    return directory;
}