81 lines
2.5 KiB
Java
81 lines
2.5 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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/**
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* Handles the process output (either stdin or stdout)
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* passing the lines to a listener
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*/
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public class StreamHandler implements Runnable {
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public interface Listener {
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/**
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* Called when a line has been read from the process output stream
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* @param s the line
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*/
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void onStringRead(String s);
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}
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private final ExecutorService executor;
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private final InputStream is;
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private final Listener listener;
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/**
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* @param is input stream to read from
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* @param listener listener to pass the read lines to
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* @throws IOException
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*/
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public StreamHandler(InputStream is, Listener listener) throws IOException {
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this.is = is;
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this.listener = listener;
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executor = Executors.newSingleThreadExecutor();
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}
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/**
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* Starts asynchronous reading
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*/
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public void start() {
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executor.submit(this);
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}
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@Override
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public void run() {
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try {
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BufferedReader br = new BufferedReader(new InputStreamReader(is));
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String line;
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while ((line = br.readLine()) != null) {
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listener.onStringRead(line);
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}
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} catch (Exception x) {
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throw new RuntimeException(x);
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}
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}
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}
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