New project for the system command execution command in gclc

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc.system/src/main/java/net/bigeon/gclc/system/ExecSystemCommand.java

@@ -0,0 +1,139 @@
+/**
+ * gclc.system:net.bigeon.gclc.system.ExecSystemCommand.java
+ * Created on: Jun 20, 2016
+ */
+package net.bigeon.gclc.system;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import fr.bigeon.gclc.command.Command;
+import fr.bigeon.gclc.exception.CommandRunException;
+import fr.bigeon.gclc.exception.CommandRunExceptionType;
+import fr.bigeon.gclc.manager.ConsoleManager;
+
+/** <p>
+ * TODO
+ *
+ * @author Emmanuel Bigeon */
+public class ExecSystemCommand extends Command {
+
+    private static final String EOL = System.lineSeparator();
+    /** The class logger */
+    private static final Logger LOGGER = Logger
+            .getLogger(ExecSystemCommand.class.getName());
+    private final ConsoleManager manager;
+
+    /** @param name
+     * @param manager */
+    public ExecSystemCommand(String name, ConsoleManager manager) {
+        super(name);
+        this.manager = manager;
+    }
+
+    /** @param name
+     * @param manager */
+    public ExecSystemCommand(ConsoleManager manager) {
+        super("exec");
+        this.manager = manager;
+    }
+
+    /* (non-Javadoc)
+     * @see fr.bigeon.gclc.command.ICommand#execute(java.lang.String[]) */
+    @Override
+    public void execute(String... args) throws CommandRunException {
+        Process proc;
+        try {
+            proc = Runtime.getRuntime().exec(args);
+        } catch (IOException e2) {
+            LOGGER.log(Level.SEVERE, "Unable to run process", e2);
+            return;
+        }
+
+        final InputStream is = proc.getInputStream();
+        Thread th = new Thread(new Runnable() {
+
+            @Override
+            public void run() {
+                try {
+                    readToEnd(is);
+                } catch (CommandRunException e) {
+                    LOGGER.log(Level.WARNING,
+                            "Manager was closed in the meantime...", e);
+                }
+            }
+        });
+        th.start();
+        manager.setPrompt("");
+        final OutputStream os = proc.getOutputStream();
+        try (BufferedWriter writer = new BufferedWriter(
+                new OutputStreamWriter(os))) {
+            while (th.isAlive()) {
+                String user;
+                try {
+                    user = manager.prompt();
+                } catch (IOException e) {
+                    throw new CommandRunException(
+                            CommandRunExceptionType.INTERACTION,
+                            "manager was closed", e, this);
+                }
+                writer.write(user + EOL);
+            }
+        } catch (IOException e1) {
+            // TODO Auto-generated catch block
+            e1.printStackTrace();
+        }
+    }
+
+    /** @param is the input stream
+     * @throws CommandRunException */
+    protected void readToEnd(InputStream is) throws CommandRunException {
+        int c;
+        try {
+            while ((c = is.read()) != -1) {
+                try {
+                    manager.print(Character.valueOf((char) c).toString());
+                } catch (IOException e) {
+                    throw new CommandRunException(
+                            CommandRunExceptionType.INTERACTION,
+                            "manager was closed", e, this);
+                }
+            }
+        } catch (IOException e) {
+            LOGGER.log(Level.INFO, "input stream reading failed", e);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see fr.bigeon.gclc.command.Command#usageDetail() */
+    @Override
+    protected String usageDetail() {
+        return "  The system command is a system dependend command like sh on linux or" +
+               System.lineSeparator() + "powershell on windows." +
+               System.lineSeparator() + System.lineSeparator() +
+               "  As an example if you give \"cat /etc/hostname\" as argument, on a linux" +
+               System.lineSeparator() +
+               "system, you would get the computer name." +
+               System.lineSeparator();
+    }
+
+    /* (non-Javadoc)
+     * @see fr.bigeon.gclc.command.Command#usagePattern() */
+    @Override
+    protected String usagePattern() {
+        return "  CMD <system command>";
+    }
+
+    /* (non-Javadoc)
+     * @see fr.bigeon.gclc.command.ICommand#tip() */
+    @Override
+    public String tip() {
+        return "Execute a system command";
+    }
+
+}

gclc.system/src/test/java/net/bigeon/gclc/system/AppTest.java

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+package net.bigeon.gclc.system;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+    extends TestCase
+{
+    /**
+     * Create the test case
+     *
+     * @param testName name of the test case
+     */
+    public AppTest( String testName )
+    {
+        super( testName );
+    }
+
+    /**
+     * @return the suite of tests being tested
+     */
+    public static Test suite()
+    {
+        return new TestSuite( AppTest.class );
+    }
+
+    /**
+     * Rigourous Test :-)
+     */
+    public void testApp()
+    {
+        assertTrue( true );
+    }
+}