Added the ExecOutputHandler abstraction so that tasks don't have to worry about more complicated stream parsing and can work with just notification of lines appearing.

Also added a default implementation that conforms to the most common pattern of making stdout info log messages and stderr warn log messages


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270550 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/myrmidon/framework/exec/DefaultExecOutputHandler.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) The Apache Software Foundation. All rights reserved.
+ *
+ * This software is published under the terms of the Apache Software License
+ * version 1.1, a copy of which has been included  with this distribution in
+ * the LICENSE.txt file.
+ */
+package org.apache.myrmidon.framework.exec;
+
+import org.apache.avalon.framework.logger.AbstractLogEnabled;
+
+/**
+ * This class is used to receive notifications of what the native
+ * process outputs to standard output and standard error.
+ *
+ * @author <a href="mailto:peter@apache.org">Peter Donald</a>
+ * @version $Revision$ $Date$
+ */
+public class DefaultExecOutputHandler
+    extends AbstractLogEnabled
+    implements ExecOutputHandler
+{
+    /**
+     * Receive notification about the process writing
+     * to standard output.
+     */
+    public void stdout( final String line )
+    {
+        getLogger().info( line );
+    }
+
+    /**
+     * Receive notification about the process writing
+     * to standard error.
+     */
+    public void stderr( final String line )
+    {
+        getLogger().warn( line );
+    }
+}

proposal/myrmidon/src/java/org/apache/myrmidon/framework/exec/ExecOutputHandler.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) The Apache Software Foundation. All rights reserved.
+ *
+ * This software is published under the terms of the Apache Software License
+ * version 1.1, a copy of which has been included  with this distribution in
+ * the LICENSE.txt file.
+ */
+package org.apache.myrmidon.framework.exec;
+
+/**
+ * This class is used to receive notifications of what the native
+ * process outputs to standard output and standard error.
+ *
+ * @author <a href="mailto:peter@apache.org">Peter Donald</a>
+ * @version $Revision$ $Date$
+ */
+public interface ExecOutputHandler
+{
+    /**
+     * Receive notification about the process writing
+     * to standard output.
+     */
+    void stdout( String line );
+
+    /**
+     * Receive notification about the process writing
+     * to standard error.
+     */
+    void stderr( String line );
+}