PicoContainer example source code file (WriterComponentMonitor.java)

This example PicoContainer source code file (WriterComponentMonitor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - PicoContainer tags/keywords

componentadapter, componentadapter, componentmonitor, constructor, constructor, exception, io, member, method, object, object, printwriter, reflection, runtimeexception, writercomponentmonitor, writercomponentmonitor

The PicoContainer WriterComponentMonitor.java source code

/*****************************************************************************
 * Copyright (C) PicoContainer Organization. All rights reserved.            *
 * ------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the BSD      *
 * style license a copy of which has been included with this distribution in *
 * the LICENSE.txt file.                                                     *
 *                                                                           *
 * Original code by Paul Hammaant                                            *
 *****************************************************************************/

package org.picocontainer.monitors;

import static org.picocontainer.monitors.ComponentMonitorHelper.methodToString;
import static org.picocontainer.monitors.ComponentMonitorHelper.memberToString;
import static org.picocontainer.monitors.ComponentMonitorHelper.ctorToString;
import static org.picocontainer.monitors.ComponentMonitorHelper.parmsToString;
import static org.picocontainer.monitors.ComponentMonitorHelper.format;

import java.io.PrintWriter;
import java.io.Writer;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Member;

import org.picocontainer.ComponentMonitor;
import org.picocontainer.ComponentAdapter;
import org.picocontainer.MutablePicoContainer;
import org.picocontainer.PicoContainer;

/**
 * A {@link ComponentMonitor} which writes to a {@link Writer}. 
 * 
 * @author Paul Hammant
 * @author Aslak Hellesøy
 * @author Mauro Talevi
 * @version $Revision: 1882 $
 */
public class WriterComponentMonitor implements ComponentMonitor {

    private final PrintWriter out;
    private final ComponentMonitor delegate;

    public WriterComponentMonitor(Writer out) {
        this(out, NullComponentMonitor.getInstance());
    }

    public WriterComponentMonitor(Writer out, ComponentMonitor delegate) {
        this.out = new PrintWriter(out);
        this.delegate = delegate;
    }

    public Constructor instantiating(PicoContainer container, ComponentAdapter componentAdapter,
                                     Constructor constructor) {
        out.println(format(ComponentMonitorHelper.INSTANTIATING, ctorToString(constructor)));
        return delegate.instantiating(container, componentAdapter, constructor);
    }

    public void instantiated(PicoContainer container, ComponentAdapter componentAdapter,
                             Constructor constructor,
                             Object instantiated,
                             Object[] injected,
                             long duration) {
        out.println(format(ComponentMonitorHelper.INSTANTIATED, ctorToString(constructor), duration, instantiated.getClass().getName(), parmsToString(injected)));
        delegate.instantiated(container, componentAdapter, constructor, instantiated, injected, duration);
    }

    public void instantiationFailed(PicoContainer container,
                                    ComponentAdapter componentAdapter,
                                    Constructor constructor,
                                    Exception cause) {
        out.println(format(ComponentMonitorHelper.INSTANTIATION_FAILED, ctorToString(constructor), cause.getMessage()));
        delegate.instantiationFailed(container, null, constructor, cause);
    }

    public void invoking(PicoContainer container,
                         ComponentAdapter componentAdapter,
                         Member member,
                         Object instance) {
        out.println(format(ComponentMonitorHelper.INVOKING, memberToString(member), instance));
        delegate.invoking(container, componentAdapter, member, instance);
    }

    public void invoked(PicoContainer container,
                        ComponentAdapter componentAdapter,
                        Method method,
                        Object instance,
                        long duration) {
        out.println(format(ComponentMonitorHelper.INVOKED, methodToString(method), instance, duration));
        delegate.invoked(container, componentAdapter, method, instance, duration);
    }

    public void invocationFailed(Member member, Object instance, Exception cause) {
        out.println(format(ComponentMonitorHelper.INVOCATION_FAILED, memberToString(member), instance, cause.getMessage()));
        delegate.invocationFailed(member, instance, cause);
    }

    public void lifecycleInvocationFailed(MutablePicoContainer container,
                                          ComponentAdapter componentAdapter, Method method,
                                          Object instance,
                                          RuntimeException cause) {
        out.println(format(ComponentMonitorHelper.LIFECYCLE_INVOCATION_FAILED, methodToString(method), instance, cause.getMessage()));
        delegate.lifecycleInvocationFailed(container, componentAdapter, method, instance, cause);
    }

    public Object noComponentFound(MutablePicoContainer container, Object componentKey) {
        out.println(format(ComponentMonitorHelper.NO_COMPONENT, componentKey));
        return delegate.noComponentFound(container, componentKey);
    }
}