Lab.java

/*******************************************************************************
 * Copyright 2011
 * Ubiquitous Knowledge Processing (UKP) Lab
 * Technische Universität Darmstadt
 *
 * 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 org.dkpro.lab;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Properties;

import org.dkpro.lab.conversion.ConversionService;
import org.dkpro.lab.engine.TaskContextFactory;
import org.dkpro.lab.engine.TaskExecutionService;
import org.dkpro.lab.logging.LoggingService;
import org.dkpro.lab.storage.StorageService;
import org.dkpro.lab.task.Task;
import org.dkpro.lab.task.TaskContextMetadata;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.dao.DataAccessResourceFailureException;

public class Lab
{
    public static final String DEFAULT_CONTEXT = "/META-INF/spring/context.xml";

    // {
    // java.util.logging.Logger rootLogger = LogManager.getLogManager().getLogger("");
    // Handler[] handlers = rootLogger.getHandlers();
    // for (int i = 0; i < handlers.length; i++) {
    // rootLogger.removeHandler(handlers[i]);
    // }
    // SLF4JBridgeHandler.install();
    // }

    private static Lab instance;

    private ApplicationContext context;

    public static synchronized Lab getInstance()
    {
        if (instance == null) {
            instance = newInstance(DEFAULT_CONTEXT);
        }
        return instance;
    }

    public static Lab newInstance(String aContext)
    {
        Lab lab = new Lab();
        lab.context = new ClassPathXmlApplicationContext(aContext, lab.getClass());
        return lab;
    }

    public void setProperty(String aKey, String aValue)
    {
        context.getBean("Properties", Properties.class).setProperty(aKey, aValue);
    }

    public String getProperty(String aKey)
    {
        return context.getBean("Properties", Properties.class).getProperty(aKey);
    }

    public TaskExecutionService getTaskExecutionService()
    {
        return (TaskExecutionService) context.getBean("TaskExecutionService");
    }

    public StorageService getStorageService()
    {
        return (StorageService) context.getBean("StorageService");
    }

    public ConversionService getConversionService()
    {
        return (ConversionService) context.getBean("ConversionService");
    }

    public LoggingService getLoggingService()
    {
        return (LoggingService) context.getBean("LoggingService");
    }

    public TaskContextFactory getTaskContextFactory()
    {
        return (TaskContextFactory) context.getBean("TaskContextFactory");
    }

    public void runAll(Task... aConfigurations)
        throws Exception
    {
        for (Task task : aConfigurations) {
            run(task);
        }
    }

    public String run(Task aConfiguration)
        throws Exception
    {
        return getTaskExecutionService().run(aConfiguration);
    }

    public String runAsking(Task aConfiguration)
        throws Exception
    {
        boolean found;
        TaskContextMetadata meta = null;
        try {
            meta = getStorageService().getLatestContext(aConfiguration.getType(),
                    aConfiguration.getDescriminators());
            found = true;
        }
        catch (DataAccessResourceFailureException e) {
            found = false;
        }

        boolean execute = true;
        if (found) {
            InputStreamReader converter = new InputStreamReader(System.in);
            BufferedReader in = new BufferedReader(converter);
            String line = "";
            while (line != null) {
                System.out.println("[" + aConfiguration.getType() + "] has already been executed in"
                        + " this configuration. Do you wish to execute it again? (y/n)");
                line = in.readLine().toLowerCase();
                if ("y".equals(line)) {
                    execute = true;
                    break;
                }
                if ("n".equals(line)) {
                    execute = false;
                    break;
                }
            }
        }

        if (execute) {
            return getTaskExecutionService().run(aConfiguration);
        }
        else {
            return meta.getId();
        }
    }
}