javolution.osgi.internal.OSGiServices Maven / Gradle / Ivy

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/*
 * Javolution - Java(TM) Solution for Real-Time and Embedded Systems
 * Copyright (C) 2012 - Javolution (http://javolution.org/)
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software is
 * freely granted, provided that this notice is preserved.
 */
package javolution.osgi.internal;

import javolution.context.ComputeContext;
import javolution.context.ConcurrentContext;
import javolution.context.LocalContext;
import javolution.context.LogContext;
import javolution.context.SecurityContext;
import javolution.context.StorageContext;
import javolution.context.internal.ComputeContextImpl;
import javolution.context.internal.ConcurrentContextImpl;
import javolution.context.internal.LocalContextImpl;
import javolution.context.internal.LogContextImpl;
import javolution.context.internal.SLF4jLogContextImpl;
import javolution.context.internal.SecurityContextImpl;
import javolution.context.internal.StorageContextImpl;
import javolution.io.Struct;
import javolution.lang.Configurable;
import javolution.lang.Initializer;
import javolution.lang.MathLib;
import javolution.text.Text;
import javolution.text.TextContext;
import javolution.text.TypeFormat;
import javolution.text.internal.TextContextImpl;
import javolution.util.FastBitSet;
import javolution.util.FastSortedMap;
import javolution.util.FastSortedSet;
import javolution.util.FastSortedTable;
import javolution.util.Index;
import javolution.util.function.Equalities;
import javolution.util.function.Reducers;
import javolution.xml.XMLContext;
import javolution.xml.internal.XMLContextImpl;
import javolution.xml.internal.stream.XMLInputFactoryImpl;
import javolution.xml.internal.stream.XMLOutputFactoryImpl;
import javolution.xml.internal.stream.XMLStreamReaderImpl;
import javolution.xml.internal.stream.XMLStreamWriterImpl;
import javolution.xml.stream.XMLInputFactory;
import javolution.xml.stream.XMLOutputFactory;

import org.osgi.service.log.LogService;

/**
 * The OSGi services tracked by the Javolution bundle.
 * When running outside OSGi or when the Javolution bundle is not started
 * the default service implementation is returned.
 */
public class OSGiServices {

	final static ServiceTrackerImpl CONCURRENT_CONTEXT_TRACKER = new ServiceTrackerImpl(
			ConcurrentContext.class, ConcurrentContextImpl.class);
	final static ServiceTrackerImpl CONFIGURABLE_LISTENER_TRACKER = new ServiceTrackerImpl(
			Configurable.Listener.class, ConfigurableListenerImpl.class);
	final static ServiceTrackerImpl LOCAL_CONTEXT_TRACKER = new ServiceTrackerImpl(
			LocalContext.class, LocalContextImpl.class);
	final static ServiceTrackerImpl LOG_CONTEXT_TRACKER;
	final static ServiceTrackerImpl LOG_SERVICE_TRACKER;
	final static ServiceTrackerImpl COMPUTE_CONTEXT_TRACKER = new ServiceTrackerImpl(
			ComputeContext.class, ComputeContextImpl.class);
	final static ServiceTrackerImpl SECURITY_CONTEXT_TRACKER = new ServiceTrackerImpl(
			SecurityContext.class, SecurityContextImpl.class);
	final static ServiceTrackerImpl STORAGE_CONTEXT_TRACKER = new ServiceTrackerImpl(
			StorageContext.class, StorageContextImpl.class);
	final static ServiceTrackerImpl TEXT_CONTEXT_TRACKER = new ServiceTrackerImpl(
			TextContext.class, TextContextImpl.class);
	final static ServiceTrackerImpl XML_CONTEXT_TRACKER = new ServiceTrackerImpl(
			XMLContext.class, XMLContextImpl.class);
	final static ServiceTrackerImpl XML_INPUT_FACTORY_TRACKER = new ServiceTrackerImpl(
			XMLInputFactory.class, XMLInputFactoryImpl.class);
	final static ServiceTrackerImpl XML_OUTPUT_FACTORY_TRACKER = new ServiceTrackerImpl(
			XMLOutputFactory.class, XMLOutputFactoryImpl.class);

	static {
		// Attempt to Bridge to SLF4j By Default If SLF4j-API Is Present On the Classpath
		boolean slf4jDetection;

		try {
			Class.forName("org.slf4j.LoggerFactory");
			slf4jDetection = false;
		}
		catch (final ClassNotFoundException e) {
			slf4jDetection = false;
		}

		if(slf4jDetection){
			LOG_CONTEXT_TRACKER = new ServiceTrackerImpl(
					LogContext.class, SLF4jLogContextImpl.class);
			LOG_SERVICE_TRACKER = new ServiceTrackerImpl(
					LogService.class, SLF4jLogServiceImpl.class);
		}
		else {
			LOG_CONTEXT_TRACKER = new ServiceTrackerImpl(
					LogContext.class, LogContextImpl.class);
			LOG_SERVICE_TRACKER = new ServiceTrackerImpl(
					LogService.class, LogServiceImpl.class);
		}
	}

	/** Returns concurrent context services. */
	public static ConcurrentContext getConcurrentContext() {
		return (ConcurrentContext)CONCURRENT_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns configurable listener services. */
	public static Object[] getConfigurableListeners() {
		return CONFIGURABLE_LISTENER_TRACKER.getServices();
	}

	/** Returns local context service. */
	public static LocalContext getLocalContext() {
		return (LocalContext)LOCAL_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns log context service. */
	public static LogContext getLogContext() {
		return (LogContext)LOG_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns OSGi log service. */
	public static Object[] getLogServices() {
		return LOG_SERVICE_TRACKER.getServices();
	}

	/** Returns compute context service. */
	public static ComputeContext getComputeContext() {
		return (ComputeContext) COMPUTE_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns security context service. */
	public static SecurityContext getSecurityContext() {
		return (SecurityContext) SECURITY_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns storage context service. */
	public static StorageContext getStorageContext() {
		return (StorageContext) STORAGE_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns text context service. */
	public static TextContext getTextContext() {
		return (TextContext)TEXT_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns xml context service. */
	public static XMLContext getXMLContext() {
		return (XMLContext)XML_CONTEXT_TRACKER.getServices()[0];
	}

	/** Returns xml input factory service. */
	public static XMLInputFactory getXMLInputFactory() {
		return (XMLInputFactory)XML_INPUT_FACTORY_TRACKER.getServices()[0];
	}

	/** Returns xml output factory service. */
	public static XMLOutputFactory getXMLOutputFactory() {
		return (XMLOutputFactory)XML_OUTPUT_FACTORY_TRACKER.getServices()[0];
	}

	/** Initializes all real-time classes.  */
	public static synchronized boolean initializeRealtimeClasses() {
		final Initializer initializer = new Initializer(OSGiServices.class.getClassLoader());
		initializer.loadClass(MathLib.class);
		initializer.loadClass(Text.class);
		initializer.loadClass(TypeFormat.class);
		initializer.loadClass(Struct.class);
		initializer.loadClass(FastBitSet.class);
		initializer.loadClass(FastSortedMap.class);
		initializer.loadClass(FastSortedSet.class);
		initializer.loadClass(FastSortedTable.class);
		initializer.loadClass(Index.class); // Preallocates.
		initializer.loadClass(Reducers.class);
		initializer.loadClass(Equalities.class);
		initializer.loadClass(XMLStreamReaderImpl.class);
		initializer.loadClass(XMLStreamWriterImpl.class);
		return initializer.initializeLoadedClasses();
	}
}