代码之家 › 专栏 › 技术社区 › KitsuneYMG

何时使用ServiceTracker vs ServiceReference

osgi java

KitsuneYMG · 技术社区 · 16 年前

第一种方法来自EclipseRCP手册,使用ServiceReference:

String filter="(objectclass="+IModelCreator.class.getName()+")";
context.addServiceListener(this, filter);
modelCreators = Collections.synchronizedMap(
    new HashMap<ModelID, List<IModelCreator>>());
ServiceReference references[] = context.getServiceReferences(null, filter);
if(references==null) return;
for(int i=0;i<references.length;++i) {
    this.serviceChanged(new ServiceEvent(ServiceEvent.REGISTERED,
        references[i]));
}

ServiceTracker logReaderTracker = new ServiceTracker(context,
                org.osgi.service.log.LogReaderService.class.getName(), null);
logReaderTracker.open();
Object[] readers = logReaderTracker.getServices();
if (readers != null) {
        for (int i = 0; i < readers.length; i++) {
        LogReaderService lrs = (LogReaderService) readers[i];
        m_readers.add(lrs);
        lrs.addLogListener(m_logger);
    }
}
logReaderTracker.close();