/// <summary>
/// 注销服务
/// </summary>
public void Unregister()
{
ServiceReferenceImpl reference;
lock (registry)
{
lock (registrationLock)
{
if (state != REGISTERED)
{ /* in the process of unregisterING */
throw new IllegalStateException("The state is invalidate.");
}
registry.RemoveServiceRegistration(context, this);
state = UNREGISTERING; /* mark unregisterING */
reference = this.reference; /* used to publish event outside sync */
}
}
/* must not hold the registrationLock when this event is published */
/// registry.publishServiceEvent(new ServiceEvent(ServiceEvent.UNREGISTERING, reference));
int size = 0;
BundleContextImpl[] users = null;
lock (registrationLock)
{
/* we have published the ServiceEvent, now mark the service fully unregistered */
state = UNREGISTERED;
size = contextsUsing.Count;
if (size > 0)
{
users = new BundleContextImpl[size];
contextsUsing.CopyTo(users, 0);
}
}
/* must not hold the registrationLock while releasing services */
for (int i = 0; i < size; i++)
{
ReleaseService(users[i]);
}
lock (registrationLock)
{
contextsUsing.Clear();
reference = null; /* mark registration dead */
}
/* The property field must remain valid after unregister completes. */
}
/// <summary>
/// 检查是否可以分配给指定的服务引用
/// </summary>
/// <param name="context"></param>
/// <param name="reference"></param>
/// <returns></returns>
internal static bool IsAssignableTo(BundleContextImpl context, ServiceReferenceImpl reference)
{
AbstractBundle bundle = context.GetBundleImpl();
string[] clazzes = reference.GetClasses();
for (int i = 0, len = clazzes.Length; i < len; i++)
{
if (!reference.IsAssignableTo(bundle, clazzes[i]))
{
return(false);
}
}
return(true);
}
/// <summary>
/// 完成注册操作
/// </summary>
/// <param name="props"></param>
internal void Register(IDictionary <string, object> props)
{
ServiceReferenceImpl reference;
lock (registry)
{
lock (registrationLock)
{
reference = this.reference; /* used to publish event outside sync */
this.properties = CreateProperties(props); /* must be valid after unregister is called. */
}
registry.AddServiceRegistration(context, this);
}
}
/// <summary>
/// 检查当前对象是否与指定的服务引用对象相等
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(object obj)
{
if (obj == this)
{
return(true);
}
if (!(obj is ServiceReferenceImpl))
{
return(false);
}
ServiceReferenceImpl other = (ServiceReferenceImpl)obj;
return(registration == other.registration);
}
/// <summary>
/// 更新服务相关的属性
/// </summary>
/// <param name="props"></param>
public void SetProperties(IDictionary <string, object> props)
{
ServiceReferenceImpl reference;
ServiceProperties previousProperties;
lock (registry)
{
lock (registrationLock)
{
if (state != REGISTERED)
{ /* in the process of unregisterING */
throw new IllegalStateException("The service has registered.");
}
reference = this.reference; /* used to publish event outside sync */
previousProperties = this.properties;
this.properties = CreateProperties(props);
}
registry.ModifyServiceRegistration(context, this);
}
}
/// <summary>
/// 获取所有的服务引用
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public ServiceReferenceImpl[] GetRegisteredServices(BundleContextImpl context)
{
IList references = ChangeRegistrationsToReferences(LookupServiceRegistrations(context));
if (references == null)
{
return(null);
}
int size = references.Count;
if (size == 0)
{
return(null);
}
var newReferences = new ServiceReferenceImpl[size];
references.CopyTo(newReferences, 0);
return(newReferences);
}
/// <summary>
/// 根据过滤条件获取服务引用
/// </summary>
/// <param name="context"></param>
/// <param name="clazz"></param>
/// <param name="filterstring"></param>
/// <param name="allservices"></param>
/// <returns></returns>
public ServiceReferenceImpl[] GetServiceReferences(BundleContextImpl context, string clazz, string filterstring, bool allservices)
{
IFilter filter = (filterstring == null) ? null : context.createFilter(filterstring);
ArrayList references = ChangeRegistrationsToReferences(LookupServiceRegistrations(clazz, filter)) as ArrayList;
if (references == null)
{
return(null);
}
IList listWaitForDeleting = new ArrayList();
var iter = references.GetEnumerator();
while (iter.MoveNext())
{
ServiceReferenceImpl reference = (ServiceReferenceImpl)iter.Current;
if (!allservices && !IsAssignableTo(context, reference))
{
listWaitForDeleting.Add(iter.Current);
}
}
foreach (var item in listWaitForDeleting)
{
references.Remove(item);
}
int size = references.Count;
if (size == 0)
{
return(null);
}
var newReferences = new ServiceReferenceImpl[size];
references.CopyTo(newReferences);
return(newReferences);
}
internal ServiceRegistrationImpl(ServiceRegistry registry, BundleContextImpl context, String[] clazzes, Object service)
{
this.registry = registry;
this.context = context;
this.bundle = context.GetBundleImpl();
this.framework = context.Framework;
this.clazzes = clazzes; /* must be set before calling createProperties. */
this.service = service;
this.serviceid = registry.GetNextServiceId(); /* must be set before calling createProperties. */
this.contextsUsing = new ArrayList(10);
lock (registrationLock)
{
this.state = REGISTERED;
/* We leak this from the constructor here, but it is ok
* because the ServiceReferenceImpl constructor only
* stores the value in a final field without
* otherwise using it.
*/
this.reference = new ServiceReferenceImpl(this);
}
}
/// <summary>
/// 获取已被使用的所有的服务引用
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public ServiceReferenceImpl[] GetServicesInUse(BundleContextImpl context)
{
Hashtable servicesInUse = context.GetServicesInUseMap();
if (servicesInUse == null)
{
return(null);
}
IList references;
lock (servicesInUse)
{
if (servicesInUse.Count == 0)
{
return(null);
}
references = ChangeRegistrationsToReferences(new ArrayList(servicesInUse.Keys));
}
if (references != null)
{
int size = references.Count;
if (size == 0)
{
return(null);
}
ServiceReferenceImpl[] newArray = new ServiceReferenceImpl[size];
references.CopyTo(newArray, 0);
return(newArray);
}
return(null);
}
/// <summary>
/// 根据服务引用释放服务
/// </summary>
/// <param name="context"></param>
/// <param name="reference"></param>
/// <returns></returns>
public bool UngetService(BundleContextImpl context, ServiceReferenceImpl reference)
{
ServiceRegistrationImpl registration = reference.Registration;
return(registration.UngetService(context));
}
/// <summary>
/// 根据服务引用获取服务对象
/// </summary>
/// <param name="context"></param>
/// <param name="reference"></param>
/// <returns></returns>
public object GetService(BundleContextImpl context, ServiceReferenceImpl reference)
{
return(reference.Registration.GetService(context));
}