diff --git a/src/share/classes/com/sun/media/sound/JDK13Services.java b/src/share/classes/com/sun/media/sound/JDK13Services.java index 85b1de618d6031d5890cd925ae6c00e1ab9f8c4c..9f19a8734e3a88964f35dd1b736bf3d576847c53 100644 --- a/src/share/classes/com/sun/media/sound/JDK13Services.java +++ b/src/share/classes/com/sun/media/sound/JDK13Services.java @@ -25,27 +25,33 @@ package com.sun.media.sound; +import java.util.ArrayList; import java.util.Collections; -import java.util.HashMap; import java.util.List; -import java.util.Map; import java.util.Properties; import javax.sound.midi.Receiver; import javax.sound.midi.Sequencer; import javax.sound.midi.Synthesizer; import javax.sound.midi.Transmitter; +import javax.sound.midi.spi.MidiDeviceProvider; +import javax.sound.midi.spi.MidiFileReader; +import javax.sound.midi.spi.MidiFileWriter; +import javax.sound.midi.spi.SoundbankReader; import javax.sound.sampled.Clip; import javax.sound.sampled.Port; import javax.sound.sampled.SourceDataLine; import javax.sound.sampled.TargetDataLine; +import javax.sound.sampled.spi.AudioFileReader; +import javax.sound.sampled.spi.AudioFileWriter; +import javax.sound.sampled.spi.FormatConversionProvider; +import javax.sound.sampled.spi.MixerProvider; /** - * JDK13Services uses the Service class in JDK 1.3 - * to discover a list of service providers installed - * in the system. - * + * JDK13Services uses the Service class in JDK 1.3 to discover a list of service + * providers installed in the system. + *

* This class is public because it is called from javax.sound.midi.MidiSystem * and javax.sound.sampled.AudioSystem. The alternative would be to make * JSSecurityManager public, which is considered worse. @@ -54,80 +60,55 @@ import javax.sound.sampled.TargetDataLine; */ public final class JDK13Services { - /** The default for the length of the period to hold the cache. - This value is given in milliseconds. It is equivalent to - 1 minute. - */ - private static final long DEFAULT_CACHING_PERIOD = 60000; - - /** Filename of the properties file for default provider properties. - This file is searched in the subdirectory "lib" of the JRE directory - (this behaviour is hardcoded). - */ + /** + * Filename of the properties file for default provider properties. This + * file is searched in the subdirectory "lib" of the JRE directory (this + * behaviour is hardcoded). + */ private static final String PROPERTIES_FILENAME = "sound.properties"; - /** Cache for the providers. - Class objects of the provider type (MixerProvider, MidiDeviceProvider - ...) are used as keys. The values are instances of ProviderCache. - */ - private static final Map providersCacheMap = new HashMap(); - - - /** The length of the period to hold the cache. - This value is given in milliseconds. - */ - private static long cachingPeriod = DEFAULT_CACHING_PERIOD; - - /** Properties loaded from the properties file for default provider - properties. - */ + /** + * Properties loaded from the properties file for default provider + * properties. + */ private static Properties properties; - - /** Private, no-args constructor to ensure against instantiation. + /** + * Private, no-args constructor to ensure against instantiation. */ private JDK13Services() { } - - /** Set the period provider lists are cached. - This method is only intended for testing. - */ - public static void setCachingPeriod(int seconds) { - cachingPeriod = seconds * 1000L; - } - - - /** Obtains a List containing installed instances of the - providers for the requested service. - The List of providers is cached for the period of time given by - {@link #cachingPeriod cachingPeriod}. During this period, the same - List instance is returned for the same type of provider. After this - period, a new instance is constructed and returned. The returned - List is immutable. - @param serviceClass The type of providers requested. This should be one - of AudioFileReader.class, AudioFileWriter.class, - FormatConversionProvider.class, MixerProvider.class, - MidiDeviceProvider.class, MidiFileReader.class, MidiFileWriter.class or - SoundbankReader.class. - @return A List of providers of the requested type. This List is - immutable. + /** + * Obtains a List containing installed instances of the providers for the + * requested service. The returned List is immutable. + * + * @param serviceClass The type of providers requested. This should be one + * of AudioFileReader.class, AudioFileWriter.class, + * FormatConversionProvider.class, MixerProvider.class, + * MidiDeviceProvider.class, MidiFileReader.class, + * MidiFileWriter.class or SoundbankReader.class. + * + * @return A List of providers of the requested type. This List is + * immutable. */ - public static synchronized List getProviders(Class serviceClass) { - ProviderCache cache = (ProviderCache) providersCacheMap.get(serviceClass); - if (cache == null) { - cache = new ProviderCache(); - providersCacheMap.put(serviceClass, cache); + public static List getProviders(final Class serviceClass) { + final List providers; + if (!MixerProvider.class.equals(serviceClass) + && !FormatConversionProvider.class.equals(serviceClass) + && !AudioFileReader.class.equals(serviceClass) + && !AudioFileWriter.class.equals(serviceClass) + && !MidiDeviceProvider.class.equals(serviceClass) + && !SoundbankReader.class.equals(serviceClass) + && !MidiFileWriter.class.equals(serviceClass) + && !MidiFileReader.class.equals(serviceClass)) { + providers = new ArrayList<>(0); + } else { + providers = JSSecurityManager.getProviders(serviceClass); } - if (cache.providers == null || - System.currentTimeMillis() > cache.lastUpdate + cachingPeriod) { - cache.providers = Collections.unmodifiableList(JSSecurityManager.getProviders(serviceClass)); - cache.lastUpdate = System.currentTimeMillis(); - } - return cache.providers; + return Collections.unmodifiableList(providers); } - /** Obtain the provider class name part of a default provider property. @param typeClass The type of the default provider property. This should be one of Receiver.class, Transmitter.class, Sequencer.class, @@ -219,14 +200,4 @@ public final class JDK13Services { } return properties; } - - // INNER CLASSES - - private static class ProviderCache { - // System time of the last update in milliseconds. - public long lastUpdate; - - // The providers. - public List providers; - } } diff --git a/src/share/classes/com/sun/media/sound/JSSecurityManager.java b/src/share/classes/com/sun/media/sound/JSSecurityManager.java index ef34bc4adf9d8f8461acf2f02a356f3eefd68bef..60549a77ea4bc66468bd7a65a1b2263a397833e3 100644 --- a/src/share/classes/com/sun/media/sound/JSSecurityManager.java +++ b/src/share/classes/com/sun/media/sound/JSSecurityManager.java @@ -185,8 +185,8 @@ final class JSSecurityManager { return thread; } - static List getProviders(final Class providerClass) { - List p = new ArrayList<>(); + static synchronized List getProviders(final Class providerClass) { + List p = new ArrayList<>(7); // ServiceLoader creates "lazy" iterator instance, but it ensures that // next/hasNext run with permissions that are restricted by whatever // creates the ServiceLoader instance, so it requires to be called from