/**
* Copyright 2012 Comcast Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.comcast.cqs.controller;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.w3c.dom.Element;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.sqs.model.DeleteMessageRequest;
import com.amazonaws.services.sqs.model.GetQueueAttributesRequest;
import com.amazonaws.services.sqs.model.GetQueueAttributesResult;
import com.amazonaws.services.sqs.model.Message;
import com.amazonaws.services.sqs.model.ReceiveMessageRequest;
import com.amazonaws.services.sqs.model.ReceiveMessageResult;
import com.amazonaws.services.sqs.model.SendMessageRequest;
import com.comcast.cmb.common.controller.AdminServletBase;
import com.comcast.cmb.common.controller.CMBControllerServlet;
import com.comcast.cmb.common.util.XmlUtil;
import com.comcast.cqs.model.CQSMessage;
import com.comcast.cqs.model.CQSMessageAttribute;
import com.comcast.cqs.util.Util;
/**
* Admin page for showing messages in a queue
* @author aseem, vvenkatraman, bwolf, baosen
*
*/
public class CQSQueueMessagesPageServlet extends AdminServletBase {
private static final long serialVersionUID = 1L;
private static Logger logger = Logger.getLogger(CQSQueueMessagesPageServlet.class);
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
if (redirectUnauthenticatedUser(request, response)) {
return;
}
CMBControllerServlet.valueAccumulator.initializeAllCounters();
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String userId = request.getParameter("userId");
String queueName = request.getParameter("queueName");
String msgStr = request.getParameter("message");
String prevHandle = request.getParameter("prevHandle");
String nextHandle = request.getParameter("nextHandle");
String receiptHandle = request.getParameter("receiptHandle");
Map<?, ?> parameters = request.getParameterMap();
Message receivedMessage=null;
int shard = 0;
if (request.getParameter("shard") != null) {
shard = Integer.parseInt(request.getParameter("shard"));
}
String queueUrl = Util.getAbsoluteQueueUrlForName(queueName, userId);
connect(request);
if (parameters.containsKey("Send")) {
try {
SendMessageRequest sendMessageRequest = new SendMessageRequest(queueUrl, msgStr);
sqs.sendMessage(sendMessageRequest);
logger.debug("event=send_message queue_url= " + queueUrl + " user_id=" + userId);
} catch (Exception ex) {
logger.error("event=send_message queue_url= " + queueUrl + " user_id=" + userId, ex);
throw new ServletException(ex);
}
} else if (parameters.containsKey("Delete")) {
try {
DeleteMessageRequest deleteMessageRequest = new DeleteMessageRequest(queueUrl, receiptHandle);
sqs.deleteMessage(deleteMessageRequest);
logger.debug("event=delete_message queue_url= " + queueUrl + " receipt_handle=" + receiptHandle);
} catch (Exception ex) {
logger.error("event=delete_message queue_url= " + queueUrl + " receipt_handle=" + receiptHandle, ex);
throw new ServletException(ex);
}
} else if (parameters.containsKey("Receive")) {
try {
ReceiveMessageRequest receiveMessageRequest = new ReceiveMessageRequest(queueUrl);
receiveMessageRequest.setMessageAttributeNames(new ArrayList<String>(Arrays.asList("All")));
ReceiveMessageResult result = sqs.receiveMessage(receiveMessageRequest);
logger.debug("event=receive_message queue_url= " + queueUrl + " user_id=" + userId);
List<Message> receivedMessages=null;
if (result!=null){
receivedMessages=result.getMessages();
if(receivedMessages!=null&&receivedMessages.size()>0){
receivedMessage=receivedMessages.get(0);
}
}
} catch (Exception ex) {
logger.error("event=receive_message queue_url= " + queueUrl + " user_id=" + userId, ex);
throw new ServletException(ex);
}
}
int numberOfShards = 1;
try {
GetQueueAttributesRequest getQueueAttributesRequest = new GetQueueAttributesRequest(queueUrl);
getQueueAttributesRequest.setAttributeNames(Arrays.asList("NumberOfShards"));
GetQueueAttributesResult getQueueAttributesResult = sqs.getQueueAttributes(getQueueAttributesRequest);
Map<String, String> attributes = getQueueAttributesResult.getAttributes();
numberOfShards = Integer.parseInt(attributes.get("NumberOfShards"));
} catch (Exception ex) {
logger.error("event=get_queue_attributes url=" + queueUrl);
}
out.println("<html>");
out.println("<script type='text/javascript' language='javascript'>");
out.println("function setVisibility(id, buttonid) {");
out.println("if(document.getElementById(buttonid).value=='Less'){");
out.println("document.getElementById(buttonid).value = 'More';");
out.println("document.getElementById(id).style.display = 'none';");
out.println("}else{");
out.println("document.getElementById(buttonid).value = 'Less';");
out.println("document.getElementById(id).style.display = 'inline';");
out.println("}");
out.println("}");
out.println("</script>");
header(request, out, "Peek Messages for Queue " + queueName);
out.println("<body>");
out.println("<h2>Peek Messages for Queue " + queueName + "</h2>");
if (user != null) {
out.println("<table><tr><td><b>User Name:</b></td><td>"+ user.getUserName()+"</td></tr>");
out.println("<tr><td><b>User ID:</b></td><td>"+ user.getUserId()+"</td></tr>");
out.println("<tr><td><b>Access Key:</b></td><td>"+user.getAccessKey()+"</td></tr>");
out.println("<tr><td><b>Access Secret:</b></td><td>"+user.getAccessSecret()+"</td></tr>");
out.println("<tr><td><b>Queue Name:</b></td><td>"+queueName+"</td></tr></table>");
}
out.println("<p><table><tr><td><b>Send message:</b></td><td></td></tr>");
out.println("<form id='frm1' action=\"/webui/cqsuser/message/?userId="+userId+"&queueName="+queueName+"\" method=POST>");
out.println("<tr><td><textarea rows='3' cols='50' name='message'></textarea><input type='hidden' name='userId' value='"+ userId + "'></td><td valign='bottom'><input type='submit' value='Send' name='Send' /></td></tr></form>");
out.println("<tr><td> </td></tr>");
if (numberOfShards > 1) {
out.println("<form id='frm2' action=\"/webui/cqsuser/message/?userId="+userId+"&queueName="+queueName+"\" method=POST>");
out.println("<tr><td>Shard: <select name='shard' onChange='document.getElementById(\"frm2\").submit();'>");
for (int i=0; i<numberOfShards; i++) {
out.print("<option value='" + i + "'");
if (shard == i) {
out.print(" selected");
}
out.println(">" + i + "</option>");
}
out.println("</form></select></td></tr></table></p>");
} else {
out.println("</table></p>");
}
// for receive message
out.println("<form id='formsendmessage' action=\"/webui/cqsuser/message/?userId="+userId+"&queueName="+queueName+"\" method=POST>");
out.println("<table><tr><td><b>Receive Message:</b></td>");
out.println("<td><input type='hidden' name='userId' value='"+ userId + "'></td><td valign='bottom'><input type='submit' value='Receive Message' name='Receive' /></td>");
out.println("</form></tr></table>");
// showing received message
out.println("<p><hr width='100%' align='left' /><p>");
out.println("<h3>Received Messages</h3>");
if (receivedMessage!=null) {
Map<String, String> attributes = receivedMessage.getAttributes();
String timeSent = "";
if (attributes.get("SentTimestamp") != null) {
try { timeSent = new Date(Long.parseLong(attributes.get("SentTimestamp"))).toString(); } catch (Exception ex) {}
}
String timeReceived = "";
if (attributes.get("ApproximateFirstReceiveTimestamp") != null) {
try { timeReceived = new Date(Long.parseLong(attributes.get("ApproximateFirstReceiveTimestamp"))).toString(); } catch (Exception ex) {}
}
out.println("<table class = 'alternatecolortable'>");
out.println("<tr><th></th><th>Receipt Handle</th><th>MD5</th><th>Body</th><th>Num Msg Attributes</th><th>Time Sent</th><th>Time First Received (Appr.)</th><th>Receive Count (Appr.)</th><th>Sender</th><th> </th></tr>");
out.println("<tr>");
out.println("<td>0</td>");
out.println("<td>" + receivedMessage.getReceiptHandle() + "</td>");
out.println("<td>" + receivedMessage.getMD5OfBody() + "</td>");
String messageBody=receivedMessage.getBody();
String messageBodyPart1=null;
String messageBodyPart2=null;
if ((messageBody!=null) && (messageBody.length()>300)) {
messageBodyPart1=messageBody.substring(0, 299);
messageBodyPart2=messageBody.substring(299);
out.println("<td>");
out.println(messageBodyPart1);
out.println("<div id='rdetail' style=\"display: none;\">"+messageBodyPart2+"</div>");
out.println("<input type=button name=type id='rbt' value='More' onclick=\"setVisibility('rdetail', 'rbt');\";> ");
out.println("</td>");
} else {
out.println("<td>"+ receivedMessage.getBody() + "</td>");
}
out.println("<td>"+ receivedMessage.getMessageAttributes().size() + "</td>");
out.println("<td>"+ timeSent + "</td>");
out.println("<td>"+ timeReceived + "</td>");
out.println("<td>"+ attributes.get("ApproximateReceiveCount") + "</td>");
out.println("<td>"+ attributes.get("SenderId") + "</td>");
out.println("<td><form action=\"/webui/cqsuser/message/?userId="+user.getUserId()+"&queueName="+queueName+"&receiptHandle="+receivedMessage.getReceiptHandle()+"\" method=POST><input type='submit' value='Delete' name='Delete'/><input type='hidden' name='queueUrl' value='"+ queueUrl+ "' /></form></td></tr>");
out.println("</table>");
} else {
out.println("<p><i>no messages</i></p>");
}
List<CQSMessage> availableMessages = null;
String queueFirstMessageHandle = null;
try {
if (queueUrl != null) {
String peekRequestUrl = cqsServiceBaseUrl + user.getUserId() + "/" + queueName + "?Action=PeekMessage&AWSAccessKeyId=" + user.getAccessKey() + "&MaxNumberOfMessages=10&Shard=" + shard + "&MessageAttributeName.1=All";
if (prevHandle != null) {
peekRequestUrl += "&PreviousReceiptHandle=" + prevHandle;
} else if (nextHandle != null) {
peekRequestUrl += "&NextReceiptHandle=" + nextHandle;
}
AWSCredentials awsCredentials=new BasicAWSCredentials(user.getAccessKey(),user.getAccessSecret());
String peekXml = httpPOST(cqsServiceBaseUrl, peekRequestUrl,awsCredentials);
Element root = XmlUtil.buildDoc(peekXml);
List<Element> messageElements = XmlUtil.getCurrentLevelChildNodes(XmlUtil.getCurrentLevelChildNodes(root, "ReceiveMessageResult").get(0), "Message");
for (Element messageElement : messageElements) {
if (availableMessages == null) {
availableMessages = new ArrayList<CQSMessage>();
}
String body = XmlUtil.getCurrentLevelTextValue(messageElement, "Body");
String id = XmlUtil.getCurrentLevelTextValue(messageElement, "MessageId").trim();
String handle = XmlUtil.getCurrentLevelTextValue(messageElement, "ReceiptHandle").trim();
CQSMessage msg = new CQSMessage(id, body);
msg.setReceiptHandle(handle);
List<Element> attributeElements = XmlUtil.getCurrentLevelChildNodes(messageElement, "Attribute");
Map<String, String> attributes = new HashMap<String, String>();
for (Element attribute : attributeElements) {
String name = XmlUtil.getCurrentLevelTextValue(attribute, "Name");
String value = XmlUtil.getCurrentLevelTextValue(attribute, "Value");
if (name != null && value != null) {
attributes.put(name, value);
}
}
msg.setAttributes(attributes);
List<Element> messageAttributeElements = XmlUtil.getCurrentLevelChildNodes(messageElement, "MessageAttribute");
Map<String, CQSMessageAttribute> messageAttributes = new HashMap<String, CQSMessageAttribute>();
for (Element attribute : messageAttributeElements) {
String name = XmlUtil.getCurrentLevelTextValue(attribute, "Name");
messageAttributes.put(name, new CQSMessageAttribute(name, name));
}
msg.setMessageAttributes(messageAttributes);
availableMessages.add(msg);
}
//retrieve first messageId from queue. this is for pagination
String peekRequestFirstMessageUrl = cqsServiceBaseUrl + user.getUserId() + "/" + queueName + "?Action=PeekMessage&AWSAccessKeyId=" + user.getAccessKey() + "&MaxNumberOfMessages=1&Shard=" + shard;
String peekFirstMessageXml = httpPOST(cqsServiceBaseUrl, peekRequestFirstMessageUrl,awsCredentials);
Element rootFirstMessage = XmlUtil.buildDoc(peekFirstMessageXml);
List<Element> messageElementsForFirstMessage = XmlUtil.getCurrentLevelChildNodes(XmlUtil.getCurrentLevelChildNodes(rootFirstMessage, "ReceiveMessageResult").get(0), "Message");
if (messageElementsForFirstMessage.size() == 1){
queueFirstMessageHandle = XmlUtil.getCurrentLevelTextValue(messageElementsForFirstMessage.get(0), "ReceiptHandle").trim();
}
}
} catch (Exception ex) {
logger.error("event=peek_message queue_url=" + queueUrl, ex);
throw new ServletException(ex);
}
String previousHandle = null;
nextHandle = null;
out.println("<p><hr width='100%' align='left' /><p>");
out.println("<h3>Available Messages</h3>");
if ((availableMessages==null) || (availableMessages.size()==0)) {
out.println("<p><i>no messages</i></p>");
}
for (int i = 0; availableMessages != null && i < availableMessages.size(); i++) {
CQSMessage message = availableMessages.get(i);
Map<String, String> attributes = message.getAttributes();
String timeSent = "";
if (attributes.get("SentTimestamp") != null) {
try { timeSent = new Date(Long.parseLong(attributes.get("SentTimestamp"))).toString(); } catch (Exception ex) {}
}
String timeReceived = "";
if (attributes.get("ApproximateFirstReceiveTimestamp") != null) {
try { timeReceived = new Date(Long.parseLong(attributes.get("ApproximateFirstReceiveTimestamp"))).toString(); } catch (Exception ex) {}
}
if (i == 0) {
out.println("<table class = 'alternatecolortable'>");
out.println("<tr><th></th><th>Receipt Handle</th><th>MD5</th><th>Body</th><th>Num Msg Attributes</th><th>Time Sent</th><th>Time First Received (Appr.)</th><th>Receive Count (Appr.)</th><th>Sender</th><th> </th></tr>");
previousHandle = message.getReceiptHandle();
}
out.println("<tr>");
out.println("<td>" + i + "</td>");
out.println("<td>" + message.getReceiptHandle() + "</td>");
out.println("<td>" + message.getMD5OfBody() + "</td>");
String messageBody=message.getBody();
String messageBodyPart1=null;
String messageBodyPart2=null;
if ((messageBody!=null) && (messageBody.length()>300)) {
messageBodyPart1=messageBody.substring(0, 299);
messageBodyPart2=messageBody.substring(299);
out.println("<td>");
out.println(messageBodyPart1);
out.println("<div id='detail"+i+"' style=\"display: none;\">"+messageBodyPart2+"</div>");
out.println("<input type=button name=type id='bt"+i+"' value='More' onclick=\"setVisibility('detail"+ i+"', 'bt"+i+"');\";> ");
out.println("</td>");
} else {
out.println("<td>"+ message.getBody() + "</td>");
}
out.println("<td>"+ (message.getMessageAttributes() == null ? 0 : message.getMessageAttributes().size()) + "</td>");
out.println("<td>"+ timeSent + "</td>");
out.println("<td>"+ timeReceived + "</td>");
out.println("<td>"+ attributes.get("ApproximateReceiveCount") + "</td>");
out.println("<td>"+ attributes.get("SenderId") + "</td>");
out.println("<td></td></tr>");
if (i == availableMessages.size() - 1) {
nextHandle = message.getReceiptHandle();
}
}
out.println("</table>");
//This case is for click on "Next" button of the previous page
if (prevHandle != null) {
if ((previousHandle) != null) {
out.println("<a style='float:left;' href='/webui/cqsuser/message/?userId="+user.getUserId()+"&queueName="+queueName+"&nextHandle="+previousHandle+"'>Prev</a>");
} else {
out.println("<a style='float:left;' href='javascript:history.back()'>Prev</a>");
}
} else if ( (previousHandle != null) && (!previousHandle.equals(queueFirstMessageHandle))){ //this is for all other cases
out.println("<a style='float:left;' href='/webui/cqsuser/message/?userId="+user.getUserId()+"&queueName="+queueName+"&nextHandle="+previousHandle+"'>Prev</a>");
}
if (availableMessages != null && availableMessages.size() > 0) {
out.println("<a style='float:right;' href='/webui/cqsuser/message/?userId="+user.getUserId()+"&queueName="+queueName+"&prevHandle="+nextHandle+"'>Next</a>");
}
out.println("<h5 style='text-align:center;'><a href='/webui'>ADMIN HOME</a>");
out.println("<a href='/webui/cqsuser?userId="+userId+"'>BACK TO QUEUE</a></h5>");
out.println("</body></html>");
CMBControllerServlet.valueAccumulator.deleteAllCounters();
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}