I have deployed an epl module with the code:
InputStream inputFile = this.getClass().getClassLoader().getResourceAsStream("Temperature.epl");
if (inputFile == null) {
inputFile = this.getClass().getClassLoader().getResourceAsStream("etc/Temperature.epl");
}
if (inputFile == null) {
throw new RuntimeException("Failed to find file 'Temperature.epl' in classpath or relative to classpath");
}
try {
epService.getEPAdministrator().getDeploymentAdmin().readDeploy(inputFile, null, null, null);
// subscribers Ok, tested before whith epService.getEPAdministrator().createEPL ()
// sentences ok, printed
EPStatement statement;
statement = epService.getEPAdministrator().getStatement("Monitor");
System.out.println(statement.getText() + ";");
statement.setSubscriber(new MonitorEventSubscriber());
statement = epService.getEPAdministrator().getStatement("Warning");
System.out.println(statement.getText() + ";");
statement.setSubscriber(new WarningEventSubscriber());
statement = epService.getEPAdministrator().getStatement("Error");
System.out.println(statement.getText() + ";");
statement.setSubscriber(new ErrorEventSubscriber());
}
catch (Exception e) {
throw new RuntimeException("Error deploying EPL from 'Temperature.epl': " + e.getMessage(), e);
}
I can get the sentences by statement.getText(), but the subscribers are not activated. What it's wrong?
I'm working with Esper 5.0.0
Seeing that your code uses the current classloader, you'd want to make sure the classloader is the same else you can get different engine instances.
Also have your code actually send an event to see if it matches since this code doesn't send events.
Related
Is it possible to get access to line numbers with the lines read into the PCollection from TextIO.Read? For context here, I'm processing a CSV file and need access to the line number for a given line.
If not possible through TextIO.Read it seems like it should be possible using some kind of custom Read or transform, but I'm having trouble figuring out where to begin.
You can use FileIO to read the file manually, where you can determine the line number when you read from the ReadableFile.
A simple solution can look as follows:
p
.apply(FileIO.match().filepattern("/file.csv"))
.apply(FileIO.readMatches())
.apply(FlatMapElements
.into(strings())
.via((FileIO.ReadableFile f) -> {
List<String> result = new ArrayList<>();
try (BufferedReader br = new BufferedReader(Channels.newReader(f.open(), "UTF-8"))) {
int lineNr = 1;
String line = br.readLine();
while (line != null) {
result.add(lineNr + "," + line);
line = br.readLine();
lineNr++;
}
} catch (IOException e) {
throw new RuntimeException("Error while reading", e);
}
return result;
}));
The solution above just prepends the line number to each input line.
I am using paho library Classes for Mqtt Connections org.eclipse.paho.client.mqttv3.MqttClient. (not MqttAsyncClient)
In my case when I publish using
mqttClient.publish(uid + "/p", new MqttMessage(payload.toString().getBytes()));
This method does the task for me but doesn't return anything so I can't check the latency between publish and pubAck.
To get the latency I use the following instead of directly calling publish function of mqttClient.
public long publish(JsonObject payload , String uid, int qos) {
try {
MqttTopic topic = mqttClient.getTopic(uid + "/p");
MqttMessage message = new MqttMessage(payload.toString().getBytes());
message.setQos(qos);
message.setRetained(true);
long publishTime = System.currentTimeMillis();
MqttDeliveryToken token = topic.publish(message);
token.waitForCompletion(10000);
long pubCompleted = System.currentTimeMillis();
if (token.getResponse() != null && token.getResponse() instanceof MqttPubAck) {
return pubCompleted-publishTime;
}
return -1;
} catch (Exception e) {
e.printStackTrace();
return -1;
}
}
This gets the work done, but I am not sure whether this is the right approach or not. Please let me know in case there is some other way to to do this.
I got Page source using
String pageSource = driver.getPageSource();
Now i need to save this xml file to local in cache. So i need to get element attributes like x and y attribute value rather than every time get using element.getAttribute("x");. But I am not able to parse pageSource xml file to some special character. I cannot remove this character because at if i need element value/text it shows different text if i will remove special character. Appium is use same way to do this.
I was also facing same issue and i got resolution using below code which i have written and it works fine
public static void removeEscapeCharacter(File xmlFile) {
String pattern = "(\\\"([^=])*\\\")";
String contentBuilder = null;
try {
contentBuilder = Files.toString(xmlFile, Charsets.UTF_8);
} catch (IOException e1) {
e1.printStackTrace();
}
if (contentBuilder == null)
return;
Pattern pattern2 = Pattern.compile(pattern);
Matcher matcher = pattern2.matcher(contentBuilder);
StrBuilder sb = new StrBuilder(contentBuilder);
while (matcher.find()) {
String str = matcher.group(1).substring(1, matcher.group(1).length() - 1);
try {
sb = sb.replaceFirst(StrMatcher.stringMatcher(str),
StringEscapeUtils.escapeXml(str));
} catch (Exception e) {
e.printStackTrace();
}
}
try {
Writer output = null;
output = new BufferedWriter(new FileWriter(xmlFile, false));
output.write(sb.toString());
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if you will get that kind of problem then catch it with remove special character and parse again.
try {
doc = db.parse(fileContent);
} catch (Exception e) {
removeEscapeCharacter(file);
doc = db.parse(file);
}
It might works for you.
I can able to do same using SAXParser and add handler to do for this.
Refer SAX Parser
I am trying to extract header and body information from email, the following code retrieves the header and body in their raw form. I have an email object that contains the fields from, subject, date, and body. I would like to extract these values from the email and assign them to the email object. How do I get around it? I have tried several ways like getting the header info and using a streamReader.ReadLine() to get a line but I got illegal path exceptions. I know I can use a library but I need to achieve it this way.
What I mean is this, IMAP command returns header information. And I want to extract subject value, date value, sender e-amil, etc. and assign them to my email objects corresponding values like
emailObject.subject = "subjectValue"
public class Imap
{
static void Main(string[] args)
{
try
{
path = Environment.CurrentDirectory + "\\emailresponse.txt";
if (System.IO.File.Exists(path))
System.IO.File.Delete(path);
sw = new System.IO.StreamWriter(System.IO.File.Create(path));
tcpc = new System.Net.Sockets.TcpClient("imap.gmail.com", 993);
ssl = new System.Net.Security.SslStream(tcpc.GetStream());
ssl.AuthenticateAsClient("imap.gmail.com");
receiveResponse("");
Console.WriteLine("username : ");
username = Console.ReadLine();
Console.WriteLine("password : ");
password = Console.ReadLine();
receiveResponse("$ LOGIN " + username + " " + password + " \r\n");
Console.Clear();
receiveResponse("$ LIST " + "\"\"" + " \"*\"" + "\r\n");
receiveResponse("$ SELECT INBOX\r\n");
receiveResponse("$ STATUS INBOX (MESSAGES)\r\n");
Console.WriteLine("enter the email number to fetch :");
int number = int.Parse(Console.ReadLine());
Console.WriteLine("*************Header************");
Console.WriteLine("");
// receiveResponse("$ FETCH " + number + " body[header]\r\n");
// BODY.PEEK[HEADER.FIELDS (SUBJECT)]
// StringBuilder sb = receiveResponse("$ FETCH " + number + " BODY.PEEK[HEADER.FIELDS (From Subject Date)]\r\n");
StringBuilder sb= receiveResponse("$ FETCH " + number + " body.peek[header]\r\n");
Console.WriteLine(sb);
Console.WriteLine("");
Console.WriteLine("Body");
sb = new StringBuilder();
sb=receiveResponse("$ FETCH " + number + " body[text]\r\n");
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
byte[] serverbuff = new Byte[1024];
int count = 0;
string retval = enc.GetString(serverbuff, 0, count);
Console.WriteLine(sb.ToString());
receiveResponse("$ LOGOUT\r\n");
}
catch (Exception ex)
{
Console.WriteLine("error: " + ex.Message);
}
finally
{
if (sw != null)
{
sw.Close();
sw.Dispose();
}
if (ssl != null)
{
ssl.Close();
ssl.Dispose();
}
if (tcpc != null)
{
tcpc.Close();
}
}
Console.ReadKey();
}
static StringBuilder receiveResponse(string command)
{
sb = new StringBuilder();
try
{
if (command != "")
{
if (tcpc.Connected)
{
dummy = Encoding.ASCII.GetBytes(command);
ssl.Write(dummy, 0, dummy.Length);
}
else
{
throw new ApplicationException("TCP CONNECTION DISCONNECTED");
}
}
ssl.Flush();
buffer = new byte[2048];
bytes = ssl.Read(buffer, 0, 2048);
sb.Append(Encoding.ASCII.GetString(buffer));
// Console.WriteLine(sb.ToString());
sw.WriteLine(sb.ToString());
// sb = new StringBuilder();
return sb;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message);
}
}
You said you do not want to use an IMAP library. This means that you will have to implement your own. You should start by reading RFC 3501 because there is no chance you could get the protocol right without reading the docs carefuly. In particular, you're issuing a STATUS command on the currently selected mailbox, which is explicitly forbidden by the protocol specification. The rest of the code supports the assumption that you have not read the RFC yet.
I have been trying to parse maven pom.xml. I was successful to an extent. But my problem is I cannot get the default values. I have to manually inject the default values.
For example, if version number is not specified in pom.xml, then it is obvious that parent version will be used.
If build directory is not specified then it will be target.
I need to know, which classes should I use to get these things populated automatically. Apart from that I would like to have dependency graph built for me. The code I am using to parse is
Model model = null;
FileReader reader = null;
MavenXpp3Reader mavenreader = new MavenXpp3Reader();
try {
reader = new FileReader(pomfile);
model = mavenreader.read(reader);
model.setPomFile(pomfile);
if (model.getBuild() != null) {
// location of output directory basically target
if (model.getBuild().getDirectory() == null) {
//set the build directory
} // location of compiled classes
if (model.getBuild().getOutputDirectory() == null) {
// set the classes directory
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new RuntimeException("pom file not found " + pomfile);
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("pom file is not accessible " + pomfile);
} catch (XmlPullParserException e) {
e.printStackTrace();
throw new RuntimeException("unable to parse pom " + pomfile);
} catch (NullPointerException nullPointerException)
System.out.println("Exception setting build dir "+model.getPackaging());
} finally {
if (reader != null) {
reader.close();
}
}
Thanks.
Look at the code for the help:effective-pom plugin goal, or actually use it to dump the effective POM and xml-parse the result.