Example usage for javax.xml.soap SOAPMessage writeTo

Introduction

In this page you can find the example usage for javax.xml.soap SOAPMessage writeTo.

Prototype

public abstract void writeTo(OutputStream out) throws SOAPException, IOException;

Source Link

Document

Writes this SOAPMessage object to the given output stream.

Usage

From source file:org.overlord.rtgov.tests.platforms.jbossas.slamonitor.JBossASSLAMonitorTest.java

@Test
@OperateOnDeployment("orders-app")
public void testResponseTimesFromACMgr() {

    try {//from ww  w .  j av  a 2  s  .  com
        SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
        SOAPConnection con = factory.createConnection();

        java.net.URL url = new java.net.URL(ORDER_SERVICE_URL);

        String mesg = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                + "   <soap:Body>"
                + "       <orders:submitOrder xmlns:orders=\"urn:switchyard-quickstart-demo:orders:1.0\">"
                + "            <order>" + "                <orderId>PO-19838-XYZ</orderId>"
                + "                <itemId>BUTTER</itemId>" + "                <quantity>200</quantity>"
                + "                <customer>Fred</customer>" + "            </order>"
                + "        </orders:submitOrder>" + "    </soap:Body>" + "</soap:Envelope>";

        java.io.InputStream is = new java.io.ByteArrayInputStream(mesg.getBytes());

        SOAPMessage request = MessageFactory.newInstance().createMessage(null, is);

        is.close();

        // Get base results
        QuerySpec qs1 = new QuerySpec();
        qs1.setCollection(SERVICE_RESPONSE_TIMES);

        java.util.List<?> result1base = performACMQuery(qs1);

        QuerySpec qs2 = new QuerySpec();
        qs2.setCollection("OrderService");
        qs2.setParent(SERVICE_RESPONSE_TIMES);
        qs2.setPredicate(
                new MVEL("serviceType == \"{urn:switchyard-quickstart-demo:orders:0.1.0}OrderService\" && "
                        + "operation == \"submitOrder\""));

        java.util.List<?> result2base = performACMQuery(qs2);

        // Send message
        SOAPMessage response = con.call(request, url);

        java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

        response.writeTo(baos);

        String resp = baos.toString();

        baos.close();

        if (!resp.contains("<accepted>true</accepted>")) {
            fail("Order was not accepted: " + resp);
        }

        // Wait for events to propagate
        Thread.sleep(4000);

        java.util.List<?> result1 = performACMQuery(qs1);

        System.out.println("RETRIEVED RESULTS 1=" + result1);

        if (result1 == null) {
            fail("Result 1 is null");
        }

        if (result1.size() - result1base.size() != 3) {
            fail("3 events expected, but got: " + result1.size() + " - " + result1base.size() + " = "
                    + (result1.size() - result1base.size()));
        }

        java.util.List<?> result2 = performACMQuery(qs2);

        System.out.println("RETRIEVED RESULTS 2=" + result2);

        if (result2 == null) {
            fail("Result 2 is null");
        }

        if (result2.size() - result2base.size() != 1) {
            fail("1 event expected, but got: " + result2.size() + " - " + result2base.size() + " = "
                    + (result2.size() - result2base.size()));
        }

    } catch (Exception e) {
        fail("Failed to invoke service: " + e);
    }
}

---

From source file:org.overlord.rtgov.tests.platforms.jbossas.slamonitor.JBossASSLAMonitorTest.java

@Test
@OperateOnDeployment("orders-app")
public void testResponseTimesFromSLAMonitor() {

    try {/*from   w ww .  j  a  v a  2s.  c  om*/
        SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
        SOAPConnection con = factory.createConnection();

        java.net.URL url = new java.net.URL(ORDER_SERVICE_URL);

        String mesg = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                + "   <soap:Body>"
                + "       <orders:submitOrder xmlns:orders=\"urn:switchyard-quickstart-demo:orders:1.0\">"
                + "            <order>" + "                <orderId>PO-19838-XYZ</orderId>"
                + "                <itemId>BUTTER</itemId>" + "                <quantity>200</quantity>"
                + "                <customer>Fred</customer>" + "            </order>"
                + "        </orders:submitOrder>" + "    </soap:Body>" + "</soap:Envelope>";

        java.io.InputStream is = new java.io.ByteArrayInputStream(mesg.getBytes());

        SOAPMessage request = MessageFactory.newInstance().createMessage(null, is);

        is.close();

        // Preload lists
        java.util.List<?> respTimes1before = getResponseTimes(null);
        java.util.List<?> respTimes2before = getResponseTimes("operation=submitOrder");

        SOAPMessage response = con.call(request, url);

        java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

        response.writeTo(baos);

        String resp = baos.toString();

        baos.close();

        if (!resp.contains("<accepted>true</accepted>")) {
            fail("Order was not accepted: " + resp);
        }

        // Wait for events to propagate
        Thread.sleep(4000);

        java.util.List<?> respTimes1 = getResponseTimes(null);

        if (respTimes1 == null) {
            fail("No events returned");
        }

        if (respTimes1.size() - respTimes1before.size() != 3) {
            fail("3 events expected, but got: " + respTimes1.size() + " - " + respTimes1before.size() + " = "
                    + (respTimes1.size() - respTimes1before.size()));
        }

        System.out.println("RESPONSE TIMES=" + respTimes1);

        // TODO: Sort out encoding to be able to pass fully qualified name of serviceType

        // {urn:switchyard-quickstart-demo:orders:0.1.0}OrderService
        java.util.List<?> respTimes2 = getResponseTimes(//"serviceType={urn%3Aswitchyard-quickstart-demo%3Aorders%3A0.1.0}OrderService&"+
                "operation=submitOrder");

        if (respTimes2 == null) {
            fail("No events returned");
        }

        if (respTimes2.size() - respTimes2before.size() != 1) {
            fail("1 event expected, but got: " + respTimes2.size() + " - " + respTimes2before.size() + " = "
                    + (respTimes2.size() - respTimes2before.size()));
        }

        System.out.println("RESPONSE TIMES (buy)=" + respTimes2);

    } catch (Exception e) {
        fail("Failed to invoke service: " + e);
    }
}

---

From source file:org.overlord.rtgov.tests.platforms.jbossas.slamonitor.JBossASSLAMonitorTest.java

@Test
@OperateOnDeployment("orders-app")
@Ignore/*from   w w w . j a  va  2  s. c  om*/
public void testResponseTimesOnFaultFromACMgr() {

    try {
        SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
        SOAPConnection con = factory.createConnection();

        java.net.URL url = new java.net.URL(ORDER_SERVICE_URL);

        String mesg = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                + "   <soap:Body>"
                + "       <orders:submitOrder xmlns:orders=\"urn:switchyard-quickstart-demo:orders:1.0\">"
                + "            <order>" + "                <orderId>PO-19838-XYZ</orderId>"
                + "                <itemId>LAPTOP</itemId>" + "                <quantity>200</quantity>"
                + "                <customer>Fred</customer>" + "            </order>"
                + "        </orders:submitOrder>" + "    </soap:Body>" + "</soap:Envelope>";

        java.io.InputStream is = new java.io.ByteArrayInputStream(mesg.getBytes());

        SOAPMessage request = MessageFactory.newInstance().createMessage(null, is);

        is.close();

        // Preload results
        QuerySpec qs1 = new QuerySpec();
        qs1.setCollection(SERVICE_RESPONSE_TIMES);

        java.util.List<?> result1base = performACMQuery(qs1);

        SOAPMessage response = con.call(request, url);

        java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

        response.writeTo(baos);

        String resp = baos.toString();

        baos.close();

        if (!resp.contains("Item Not Available")) {
            fail("Item not available response not received");
        }

        // Wait for events to propagate
        Thread.sleep(4000);

        java.util.List<?> result1 = performACMQuery(qs1);

        System.out.println("RETRIEVED RESULTS (Fault)=" + result1);

        if (result1 == null) {
            fail("Result 1 is null");
        }

        if (result1.size() - result1base.size() != 2) {
            fail("2 events expected, but got: " + result1.size() + " - " + result1base.size() + " = "
                    + (result1.size() - result1base.size()));
        }

    } catch (Exception e) {
        fail("Failed to invoke service: " + e);
    }
}

---

From source file:org.overlord.rtgov.tests.platforms.jbossas.slamonitor.JBossASSLAMonitorTest.java

@Test
@OperateOnDeployment("orders-app")
public void testActivityEventsProcessed() {

    EPNManager epnManager = EPNManagerAccessor.getEPNManager();

    TestListener tl = new TestListener();

    epnManager.addNotificationListener(SITUATIONS_PROCESSED, tl);

    try {//from   w  ww.j a  v  a 2s  . c  om
        SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
        SOAPConnection con = factory.createConnection();

        java.net.URL url = new java.net.URL(ORDER_SERVICE_URL);

        String mesg = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                + "   <soap:Body>"
                + "       <orders:submitOrder xmlns:orders=\"urn:switchyard-quickstart-demo:orders:1.0\">"
                + "            <order>" + "                <orderId>PO-19838-XYZ</orderId>"
                + "                <itemId>BUTTER</itemId>" + "                <quantity>200</quantity>"
                + "                <customer>Fred</customer>" + "            </order>"
                + "        </orders:submitOrder>" + "    </soap:Body>" + "</soap:Envelope>";

        java.io.InputStream is = new java.io.ByteArrayInputStream(mesg.getBytes());

        SOAPMessage request = MessageFactory.newInstance().createMessage(null, is);

        is.close();

        SOAPMessage response = con.call(request, url);

        java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

        response.writeTo(baos);

        String resp = baos.toString();

        baos.close();

        if (!resp.contains("<accepted>true</accepted>")) {
            fail("Order was not accepted: " + resp);
        }

        // Wait for events to propagate
        Thread.sleep(4000);

        if (tl.getEvents(SITUATIONS_PROCESSED) == null) {
            fail("Expecting situations processed");
        }

        // 6 instead of 3 due to the introduction of the second EPN node that also checks for SLA
        // violations, but does not generate any new situations - but this notification channel is
        // for events before they are processed.
        if (tl.getEvents(SITUATIONS_PROCESSED).size() != 6) {
            fail("Expecting 6 (sla situations) processed events, but got: "
                    + tl.getEvents(SITUATIONS_PROCESSED).size());
        }

    } catch (Exception e) {
        e.printStackTrace();
        fail("Failed to invoke service via SOAP: " + e);
    } finally {
        epnManager.removeNotificationListener(SITUATIONS_PROCESSED, tl);
    }
}

---

From source file:org.overlord.rtgov.tests.platforms.jbossas.slamonitor.JBossASSLAMonitorTest.java

@Test
@OperateOnDeployment("orders-app")
public void testActivityEventsResults() {

    EPNManager epnManager = EPNManagerAccessor.getEPNManager();

    TestListener tl = new TestListener();

    epnManager.addNotificationListener(SITUATIONS, tl);

    try {//from   w  ww  .  j a  v  a 2s . c o m
        SOAPConnectionFactory factory = SOAPConnectionFactory.newInstance();
        SOAPConnection con = factory.createConnection();

        java.net.URL url = new java.net.URL(ORDER_SERVICE_URL);

        String mesg = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                + "   <soap:Body>"
                + "       <orders:submitOrder xmlns:orders=\"urn:switchyard-quickstart-demo:orders:1.0\">"
                + "            <order>" + "                <orderId>PO-13739-ABC</orderId>"
                + "                <itemId>JAM</itemId>" + "                <quantity>50</quantity>"
                + "                <customer>Fred</customer>" + "            </order>"
                + "        </orders:submitOrder>" + "    </soap:Body>" + "</soap:Envelope>";

        java.io.InputStream is = new java.io.ByteArrayInputStream(mesg.getBytes());

        SOAPMessage request = MessageFactory.newInstance().createMessage(null, is);

        is.close();

        SOAPMessage response = con.call(request, url);

        java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

        response.writeTo(baos);

        String resp = baos.toString();

        baos.close();

        if (!resp.contains("<accepted>true</accepted>")) {
            fail("Order was not accepted: " + resp);
        }

        // Wait for events to propagate
        Thread.sleep(2000);

        // Check that all events have been processed
        if (tl.getEvents(SITUATIONS) == null) {
            fail("Expecting sla violations results");
        }

        if (tl.getEvents(SITUATIONS).size() != 2) {
            fail("Expecting 2 (sla violations) results events, but got: " + tl.getEvents(SITUATIONS).size());
        }

    } catch (Exception e) {
        e.printStackTrace();
        fail("Failed to invoke service via SOAP: " + e);
    } finally {
        epnManager.removeNotificationListener(SITUATIONS, tl);
    }
}

---

From source file:org.sakaiproject.compilatio.util.CompilatioAPIUtil.java

public static Document callCompilatioReturnDocument(String apiURL, Map<String, String> parameters,
        String secretKey, final int timeout) throws TransientSubmissionException, SubmissionException {

    SOAPConnectionFactory soapConnectionFactory;
    Document xmlDocument = null;/*w w w . j  a v a 2  s.c  o m*/
    try {
        soapConnectionFactory = SOAPConnectionFactory.newInstance();

        SOAPConnection soapConnection = soapConnectionFactory.createConnection();

        MessageFactory messageFactory = MessageFactory.newInstance();
        SOAPMessage soapMessage = messageFactory.createMessage();
        SOAPPart soapPart = soapMessage.getSOAPPart();
        SOAPEnvelope envelope = soapPart.getEnvelope();
        SOAPBody soapBody = envelope.getBody();
        SOAPElement soapBodyAction = soapBody.addChildElement(parameters.get("action"));
        parameters.remove("action");
        // api key
        SOAPElement soapBodyKey = soapBodyAction.addChildElement("key");
        soapBodyKey.addTextNode(secretKey);

        Set<Entry<String, String>> ets = parameters.entrySet();
        Iterator<Entry<String, String>> it = ets.iterator();
        while (it.hasNext()) {
            Entry<String, String> param = it.next();
            SOAPElement soapBodyElement = soapBodyAction.addChildElement(param.getKey());
            soapBodyElement.addTextNode(param.getValue());
        }

        URL endpoint = new URL(null, apiURL, new URLStreamHandler() {
            @Override
            protected URLConnection openConnection(URL url) throws IOException {
                URL target = new URL(url.toString());
                URLConnection connection = target.openConnection();
                // Connection settings
                connection.setConnectTimeout(timeout);
                connection.setReadTimeout(timeout);
                return (connection);
            }
        });

        SOAPMessage soapResponse = soapConnection.call(soapMessage, endpoint);

        // loading the XML document
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        soapResponse.writeTo(out);
        DocumentBuilderFactory builderfactory = DocumentBuilderFactory.newInstance();
        builderfactory.setNamespaceAware(true);

        DocumentBuilder builder = builderfactory.newDocumentBuilder();
        xmlDocument = builder.parse(new InputSource(new StringReader(out.toString())));
        soapConnection.close();

    } catch (UnsupportedOperationException | SOAPException | IOException | ParserConfigurationException
            | SAXException e) {
        log.error(e);
    }
    return xmlDocument;

}

---

From source file:org.sakaiproject.contentreview.compilatio.util.CompilatioAPIUtil.java

public static Document callCompilatioReturnDocument(String apiURL, Map<String, String> parameters,
        String secretKey, final int timeout, Proxy proxy, boolean isMultipart)
        throws TransientSubmissionException, SubmissionException {

    SOAPConnectionFactory soapConnectionFactory;
    Document xmlDocument = null;// w  ww .  j  ava  2s  .co m
    try {
        soapConnectionFactory = SOAPConnectionFactory.newInstance();

        SOAPConnection soapConnection = soapConnectionFactory.createConnection();

        MessageFactory messageFactory = MessageFactory.newInstance();
        SOAPMessage soapMessage = messageFactory.createMessage();
        SOAPPart soapPart = soapMessage.getSOAPPart();
        SOAPEnvelope envelope = soapPart.getEnvelope();
        SOAPBody soapBody = envelope.getBody();
        SOAPElement soapBodyAction = soapBody.addChildElement(parameters.get("action"));
        parameters.remove("action");
        // api key
        SOAPElement soapBodyKey = soapBodyAction.addChildElement("key");
        soapBodyKey.addTextNode(secretKey);

        Set<Entry<String, String>> ets = parameters.entrySet();
        Iterator<Entry<String, String>> it = ets.iterator();
        while (it.hasNext()) {
            Entry<String, String> param = it.next();
            SOAPElement soapBodyElement = soapBodyAction.addChildElement(param.getKey());
            soapBodyElement.addTextNode(param.getValue());
        }

        URL endpoint = new URL(null, apiURL, new URLStreamHandler() {
            @Override
            protected URLConnection openConnection(URL url) throws IOException {
                URL target = new URL(url.toString());
                URLConnection connection = target.openConnection();
                // Connection settings
                connection.setConnectTimeout(timeout);
                connection.setReadTimeout(timeout);
                return (connection);
            }
        });

        SOAPMessage soapResponse = soapConnection.call(soapMessage, endpoint);

        // loading the XML document
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        soapResponse.writeTo(out);
        DocumentBuilderFactory builderfactory = DocumentBuilderFactory.newInstance();
        builderfactory.setNamespaceAware(true);

        DocumentBuilder builder = builderfactory.newDocumentBuilder();
        xmlDocument = builder.parse(new InputSource(new StringReader(out.toString())));
        soapConnection.close();

    } catch (UnsupportedOperationException | SOAPException | IOException | ParserConfigurationException
            | SAXException e) {
        log.error(e);
    }
    return xmlDocument;

}

---

From source file:org.springframework.integration.sqs.AWSSecurityHandler.java

private void logMessage(final String text, final SOAPMessage message) {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    try {// w w  w  . j  a  v  a 2s . c  om
        message.writeTo(out);
        log.debug(text + out.toString()); // using system encoding
    } catch (Exception e) {
    } // ignore
}

---

From source file:org.vast.ows.server.WPSServlet.java

/**
 * Decode the query, check validity and call the right handler
 * @param query//from   w ww . j av a2s  .  co  m
 */
protected void processQuery(DescribeProcessRequest query) throws Exception {
    if (query.getRequestFormat() == null)
        throw new WPSException("A DescribeProcess WPS request must specify an request format argument");
    if (query.getOffering() == null)
        throw new WPSException("A DescribeProcess WPS request must specify an request offering argument");

    SOAPMessage describeProcessSOAPMessage = wpsUtils.createSoapMessage(describeProcessDomHelper);
    describeProcessSOAPMessage.writeTo(query.getResponseStream());
}

---

From source file:org.wso2.carbon.device.mgt.mobile.windows.api.services.enrollment.util.MessageHandler.java

/**
 * This method adds Timestamp for SOAP header, and adds Content-length for HTTP header for
 * avoiding HTTP chunking.// w  ww.  ja v  a  2  s. c  om
 *
 * @param context - Context of the SOAP Message
 */
@Override
public boolean handleMessage(SOAPMessageContext context) {

    Boolean outBoundProperty = (Boolean) context.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);

    if (outBoundProperty) {
        SOAPMessage message = context.getMessage();
        SOAPHeader header = null;
        SOAPEnvelope envelope = null;
        try {
            header = message.getSOAPHeader();
            envelope = message.getSOAPPart().getEnvelope();
        } catch (SOAPException e) {
            Response.serverError().entity("SOAP message content cannot be read.").build();
        }
        try {
            if ((header == null) && (envelope != null)) {
                header = envelope.addHeader();
            }
        } catch (SOAPException e) {
            Response.serverError().entity("SOAP header cannot be added.").build();
        }

        SOAPFactory soapFactory = null;
        try {
            soapFactory = SOAPFactory.newInstance();
        } catch (SOAPException e) {
            Response.serverError().entity("Cannot get an instance of SOAP factory.").build();
        }

        QName qNamesSecurity = new QName(PluginConstants.WS_SECURITY_TARGET_NAMESPACE,
                PluginConstants.CertificateEnrolment.SECURITY);
        SOAPHeaderElement Security = null;
        Name attributeName = null;
        try {
            if (header != null) {
                Security = header.addHeaderElement(qNamesSecurity);
            }
            if (soapFactory != null) {
                attributeName = soapFactory.createName(PluginConstants.CertificateEnrolment.TIMESTAMP_ID,
                        PluginConstants.CertificateEnrolment.TIMESTAMP_U,
                        PluginConstants.CertificateEnrolment.WSS_SECURITY_UTILITY);
            }
        } catch (SOAPException e) {
            Response.serverError().entity("Security header cannot be added.").build();
        }

        QName qNameTimestamp = new QName(PluginConstants.CertificateEnrolment.WSS_SECURITY_UTILITY,
                PluginConstants.CertificateEnrolment.TIMESTAMP);
        SOAPHeaderElement timestamp = null;
        try {
            if (header != null) {
                timestamp = header.addHeaderElement(qNameTimestamp);
                timestamp.addAttribute(attributeName, PluginConstants.CertificateEnrolment.TIMESTAMP_0);
            }
        } catch (SOAPException e) {
            Response.serverError().entity("Exception while adding timestamp header.").build();
        }
        DateTime dateTime = new DateTime();
        DateTime expiredDateTime = dateTime.plusMinutes(VALIDITY_TIME);
        String createdISOTime = dateTime.toString(ISODateTimeFormat.dateTime());
        String expiredISOTime = expiredDateTime.toString(ISODateTimeFormat.dateTime());
        createdISOTime = createdISOTime.substring(TIMESTAMP_BEGIN_INDEX,
                createdISOTime.length() - TIMESTAMP_END_INDEX);
        createdISOTime = createdISOTime + TIME_ZONE;
        expiredISOTime = expiredISOTime.substring(TIMESTAMP_BEGIN_INDEX,
                expiredISOTime.length() - TIMESTAMP_END_INDEX);
        expiredISOTime = expiredISOTime + TIME_ZONE;
        QName qNameCreated = new QName(PluginConstants.CertificateEnrolment.WSS_SECURITY_UTILITY,
                PluginConstants.CertificateEnrolment.CREATED);
        SOAPHeaderElement SOAPHeaderCreated = null;

        try {
            if (header != null) {
                SOAPHeaderCreated = header.addHeaderElement(qNameCreated);
                SOAPHeaderCreated.addTextNode(createdISOTime);
            }
        } catch (SOAPException e) {
            Response.serverError().entity("Exception while creating SOAP header.").build();
        }
        QName qNameExpires = new QName(PluginConstants.CertificateEnrolment.WSS_SECURITY_UTILITY,
                PluginConstants.CertificateEnrolment.EXPIRES);
        SOAPHeaderElement SOAPHeaderExpires = null;
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        String messageString = null;
        try {
            if (header != null) {
                SOAPHeaderExpires = header.addHeaderElement(qNameExpires);
                SOAPHeaderExpires.addTextNode(expiredISOTime);
            }
            if ((timestamp != null) && (Security != null)) {
                timestamp.addChildElement(SOAPHeaderCreated);
                timestamp.addChildElement(SOAPHeaderExpires);
                Security.addChildElement(timestamp);
            }
            message.saveChanges();
            message.writeTo(outputStream);
            messageString = new String(outputStream.toByteArray(), PluginConstants.CertificateEnrolment.UTF_8);
        } catch (SOAPException e) {
            Response.serverError().entity("Exception while creating timestamp SOAP header.").build();
        } catch (IOException e) {
            Response.serverError().entity("Exception while writing message to output stream.").build();
        }

        Map<String, List<String>> headers = (Map<String, List<String>>) context
                .get(MessageContext.HTTP_REQUEST_HEADERS);
        headers = new HashMap<String, List<String>>();
        if (messageString != null) {
            headers.put(PluginConstants.CONTENT_LENGTH, Arrays.asList(String.valueOf(messageString.length())));
        }
        context.put(MessageContext.HTTP_REQUEST_HEADERS, headers);
    }
    return true;
}

---

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