| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.sshd.util.test; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.InterruptedIOException; |
| import java.io.OutputStream; |
| import java.nio.charset.StandardCharsets; |
| |
| import org.apache.sshd.server.Command; |
| import org.apache.sshd.server.Environment; |
| import org.apache.sshd.server.ExitCallback; |
| |
| /** |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public abstract class CommandExecutionHelper implements Command, Runnable, ExitCallback { |
| private InputStream in; |
| private OutputStream out; |
| private OutputStream err; |
| private ExitCallback callback; |
| private Environment environment; |
| private Thread thread; |
| private boolean cbCalled; |
| |
| protected CommandExecutionHelper() { |
| super(); |
| } |
| |
| public InputStream getIn() { |
| return in; |
| } |
| |
| public OutputStream getOut() { |
| return out; |
| } |
| |
| public OutputStream getErr() { |
| return err; |
| } |
| |
| public Environment getEnvironment() { |
| return environment; |
| } |
| |
| public ExitCallback getExitCallback() { |
| return callback; |
| } |
| |
| @Override |
| public void setInputStream(InputStream in) { |
| this.in = in; |
| } |
| |
| @Override |
| public void setOutputStream(OutputStream out) { |
| this.out = out; |
| } |
| |
| @Override |
| public void setErrorStream(OutputStream err) { |
| this.err = err; |
| } |
| |
| @Override |
| public void setExitCallback(ExitCallback callback) { |
| this.callback = callback; |
| } |
| |
| @Override |
| public void start(Environment env) throws IOException { |
| environment = env; |
| thread = new Thread(this, "CommandExecutionHelper"); |
| thread.setDaemon(true); |
| thread.start(); |
| } |
| |
| @Override |
| public void destroy() { |
| thread.interrupt(); |
| } |
| |
| @Override |
| public void run() { |
| String command = null; |
| try (BufferedReader r = new BufferedReader(new InputStreamReader(getIn(), StandardCharsets.UTF_8))) { |
| for (;;) { |
| command = r.readLine(); |
| if (command == null) { |
| return; |
| } |
| |
| if (!handleCommandLine(command)) { |
| return; |
| } |
| } |
| } catch (InterruptedIOException e) { |
| // Ignore - signaled end |
| } catch (Exception e) { |
| String message = "Failed (" + e.getClass().getSimpleName() + ") to handle '" + command + "': " + e.getMessage(); |
| try { |
| OutputStream stderr = getErr(); |
| stderr.write(message.getBytes(StandardCharsets.US_ASCII)); |
| } catch (IOException ioe) { |
| ioe.printStackTrace(); |
| } finally { |
| onExit(-1, message); |
| } |
| } finally { |
| onExit(0); |
| } |
| } |
| |
| @Override |
| public void onExit(int exitValue, String exitMessage) { |
| if (!cbCalled) { |
| ExitCallback cb = getExitCallback(); |
| try { |
| cb.onExit(exitValue, exitMessage); |
| } finally { |
| cbCalled = true; |
| } |
| } |
| } |
| |
| /** |
| * @param command The command line |
| * @return {@code true} if continue accepting command |
| * @throws Exception If failed to handle the command line |
| */ |
| protected abstract boolean handleCommandLine(String command) throws Exception; |
| } |