com.allen_sauer.gwt.log.clientserverdemo.client.LogClientServerDemo.java Source code

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Here is the source code for com.allen_sauer.gwt.log.clientserverdemo.client.LogClientServerDemo.java

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/*
 * Copyright 2008 Fred Sauer
 * 
 * Licensed 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 com.allen_sauer.gwt.log.clientserverdemo.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.rpc.AsyncCallback;

import com.allen_sauer.gwt.log.client.Log;

/**
 * Client server logging demo.
 */
public class LogClientServerDemo implements EntryPoint {
    /**
     * Main entry point method.
     */
    @Override
    public void onModuleLoad() {
        // set uncaught exception handler
        Log.setUncaughtExceptionHandler();

        // use deferred command to catch initialization exceptions in onModuleLoad2
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            @Override
            public void execute() {
                onModuleLoad2();
            }
        });
    }

    /**
     * Deferred initialization.
     */
    public void onModuleLoad2() {
        IncrementServiceAsync service = (IncrementServiceAsync) GWT.create(IncrementService.class);

        AsyncCallback<Counter> callback = new AsyncCallback<Counter>() {
            @Override
            public void onFailure(Throwable ex) {
                Log.fatal("onFailure", ex);
            }

            @Override
            public void onSuccess(Counter counter) {
                Log.debug("onSuccess result counter is at " + counter.getCount());
            }
        };

        // execute the service
        Counter counter = new Counter();
        counter.increment();
        service.increment(counter, callback);

        new Timer() {
            @Override
            public void run() {
                Log.debug("*********************************************");
                Log.fatal("fatal - should be visible");
                Log.setCurrentLogLevel(Log.LOG_LEVEL_OFF);
                Log.fatal("fatal - should be filtered out");
                Log.setCurrentLogLevel(Log.LOG_LEVEL_OFF); // should still output client side
            }
        }.schedule(2000);

        new Timer() {
            @Override
            public void run() {
                Log.setCurrentLogLevel(Log.LOG_LEVEL_FATAL);
                Log.fatal("Here it comes...");
                try {
                    throw new NullPointerException("catch me if you can");
                } catch (Exception e) {
                    throw new RuntimeException("log me on the server if you will", e);
                }
            }
        }.schedule(4000);
    }
}