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POjava clear (not close) InputStream
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copied!<p>I wrote a server/client application in java. Now I have to create a testing component to interact with the server interactively. The testing component itself consists of a class to handle client-instances (a ProcessBuilder for each one). </p> <p>Now to the problem: to parse the server-responses (find the end of the response), I close the specific lines within escape sequences (e.g. \t\b). This works as expected, but before I send a specific command to the server, I have to clear the InputStream (discard all things within the stream, like log-entries, status-msg and so on).</p> <pre><code>//input=process.getInputStream(); //out = new BufferedWriter(new OutputStreamWriter(process.getOutputStream())); public String send(String command){ log.info("execute: " + command); try{ //clear old output int chars = input.available(); log.info("Skip " + chars + " characters from process output."); input.skip(chars); out.write(command + "\n"); out.flush(); }catch (IOException e){ log.error("could not write to process", e); } BufferedReader reader = new BufferedReader(new InputStreamReader(input)); StringBuilder str = new StringBuilder(); String line; try { while( (line = reader.readLine()) != null ){ log.info("new line " + line); if(line.contains("\t\b")){ //skip others input.skip(input.available()); break; } } } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } return str.toString(); } </code></pre> <p>But this doesn't work.</p> <p><strong>Example Output</strong></p> <pre><code>0 [main] INFO loadtesting.ClientHandler - ClientHandler started 1543748404 (localhost 9000 ) 6 [main] INFO loadtesting.ClientHandler - execute: somecommand 6 [main] INFO loadtesting.ClientHandler - Skip 0 characters from process output. 112 [main] INFO loadtesting.ClientHandler - new line Connection successfully 113 [main] INFO loadtesting.ClientHandler - new line no entries available\t\b </code></pre> <p>"Connection successfully" should be discarded.</p> <pre><code>113 [main] INFO loadtesting.ClientHandler - execute: somecommand 113 [main] INFO loadtesting.ClientHandler - Skip 0 characters from process output. 114 [main] INFO loadtesting.ClientHandler - new line no entries available\t\b 114 [main] INFO Test - Test: close 114 [main] INFO loadtesting.ClientHandler - ClientHandler Closed 1543748404 114 [main] INFO loadtesting.ClientHandler - und ciao </code></pre> <p><strong>Update</strong> I found the problem, but no solution. It's because the available method of InputStream always returns 0:</p> <blockquote> <p>The available method for class InputStream always returns 0.</p> </blockquote> <p>Now I will search for an child of IS, who implements available().</p>

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