EventConstants (OSGi Compendium Release 8)

```
@ProviderType
public interface EventConstants
```
Defines standard names for EventHandler properties.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`BUNDLE` The Bundle object of the bundle relevant to the event.
`static String`	`BUNDLE_ID` The Bundle id of the bundle relevant to the event.
`static String`	`BUNDLE_SIGNER` The Distinguished Names of the signers of the bundle relevant to the event.
`static String`	`BUNDLE_SYMBOLICNAME` The Bundle Symbolic Name of the bundle relevant to the event.
`static String`	`BUNDLE_VERSION` The version of the bundle relevant to the event.
`static String`	`DELIVERY_ASYNC_ORDERED` Event Handler delivery quality value specifying the Event Handler requires asynchronously delivered events be delivered in order.
`static String`	`DELIVERY_ASYNC_UNORDERED` Event Handler delivery quality value specifying the Event Handler does not require asynchronously delivered events be delivered in order.
`static String`	`EVENT` The forwarded event object.
`static String`	`EVENT_ADMIN_IMPLEMENTATION` The name of the implementation capability for the Event Admin specification
`static String`	`EVENT_ADMIN_SPECIFICATION_VERSION` The version of the implementation capability for the Event Admin specification
`static String`	`EVENT_DELIVERY` Service Registration property specifying the delivery qualities requested by an Event Handler service.
`static String`	`EVENT_FILTER` Service Registration property specifying a filter to further select `Event` s of interest to an Event Handler service.
`static String`	`EVENT_TOPIC` Service registration property specifying the `Event` topics of interest to an Event Handler service.
`static String`	`EXCEPTION` An exception or error.
`static String`	`EXCEPTION_CLASS` The name of the exception type.
`static String`	`EXCEPTION_MESSAGE` The exception message.
`static String`	`EXECPTION_CLASS` Deprecated. As of 1.1. Replaced by `EXCEPTION_CLASS`.
`static String`	`MESSAGE` A human-readable message that is usually not localized.
`static String`	`SERVICE` A service reference.
`static String`	`SERVICE_ID` A service's id.
`static String`	`SERVICE_OBJECTCLASS` A service's objectClass.
`static String`	`SERVICE_PID` A service's persistent identity.
`static String`	`TIMESTAMP` The time when the event occurred, as reported by `System.currentTimeMillis()`.

- Field Detail
  - EVENT_TOPIC
```
static final String EVENT_TOPIC
```
    Service registration property specifying the Event topics of interest to an Event Handler service.
    Event handlers SHOULD be registered with this property. Each value of this property is a string that describe the topics in which the handler is interested. An asterisk ('*') may be used as a trailing wildcard. Event Handlers which do not have a value for this property must not receive events. More precisely, the value of each string must conform to the following grammar:
```
  topic-description := '*' | topic ( '/*' )?
  topic := token ( '/' token )*
 
```
    The value of this property must be of type String, String[], or Collection<String>.
    See Also:
    
    Event, Constant Field Values
  - EVENT_FILTER
```
static final String EVENT_FILTER
```
    Service Registration property specifying a filter to further select Event s of interest to an Event Handler service.
    Event handlers MAY be registered with this property. The value of this property is a string containing an LDAP-style filter specification. Any of the event's properties may be used in the filter expression. Each event handler is notified for any event which belongs to the topics in which the handler has expressed an interest. If the event handler is also registered with this service property, then the properties of the event must also match the filter for the event to be delivered to the event handler.
    If the filter syntax is invalid, then the Event Handler must be ignored and a warning should be logged.
    The value of this property must be of type String.
    
    See Also:
    
    Event, Filter, Constant Field Values
  - EVENT_DELIVERY
```
static final String EVENT_DELIVERY
```
    Service Registration property specifying the delivery qualities requested by an Event Handler service.
    Event handlers MAY be registered with this property. Each value of this property is a string specifying a delivery quality for the Event handler.
    The value of this property must be of type String, String[], or Collection<String>.
    
    Since:
    
    1.3
    
    See Also:
    
    DELIVERY_ASYNC_ORDERED, DELIVERY_ASYNC_UNORDERED, Constant Field Values
  - DELIVERY_ASYNC_ORDERED
```
static final String DELIVERY_ASYNC_ORDERED
```
    Event Handler delivery quality value specifying the Event Handler requires asynchronously delivered events be delivered in order. Ordered delivery is the default for asynchronously delivered events.
    This delivery quality value is mutually exclusive with DELIVERY_ASYNC_UNORDERED. However, if both this value and DELIVERY_ASYNC_UNORDERED are specified for an event handler, this value takes precedence.
    
    Since:
    
    1.3
    
    See Also:
    
    EVENT_DELIVERY, Constant Field Values
  - DELIVERY_ASYNC_UNORDERED
```
static final String DELIVERY_ASYNC_UNORDERED
```
    Event Handler delivery quality value specifying the Event Handler does not require asynchronously delivered events be delivered in order. This may allow an Event Admin implementation to optimize asynchronous event delivery by relaxing ordering requirements.
    This delivery quality value is mutually exclusive with DELIVERY_ASYNC_ORDERED. However, if both this value and DELIVERY_ASYNC_ORDERED are specified for an event handler, DELIVERY_ASYNC_ORDERED takes precedence.
    
    Since:
    
    1.3
    
    See Also:
    
    EVENT_DELIVERY, Constant Field Values
  - BUNDLE_SIGNER
```
static final String BUNDLE_SIGNER
```
    The Distinguished Names of the signers of the bundle relevant to the event. The type of the value for this event property is String or Collection of String.
    
    See Also:
    
    Constant Field Values
  - BUNDLE_SYMBOLICNAME
```
static final String BUNDLE_SYMBOLICNAME
```
    The Bundle Symbolic Name of the bundle relevant to the event. The type of the value for this event property is String.
    
    See Also:
    
    Constant Field Values
  - BUNDLE_ID
```
static final String BUNDLE_ID
```
    The Bundle id of the bundle relevant to the event. The type of the value for this event property is Long.
    
    Since:
    
    1.1
    
    See Also:
    
    Constant Field Values
  - BUNDLE
```
static final String BUNDLE
```
    The Bundle object of the bundle relevant to the event. The type of the value for this event property is Bundle.
    
    Since:
    
    1.1
    
    See Also:
    
    Constant Field Values
  - BUNDLE_VERSION
```
static final String BUNDLE_VERSION
```
    The version of the bundle relevant to the event. The type of the value for this event property is Version.
    
    Since:
    
    1.2
    
    See Also:
    
    Constant Field Values
  - EVENT
```
static final String EVENT
```
    The forwarded event object. Used when rebroadcasting an event that was sent via some other event mechanism. The type of the value for this event property is Object.
    
    See Also:
    
    Constant Field Values
  - EXCEPTION
```
static final String EXCEPTION
```
    An exception or error. The type of the value for this event property is Throwable.
    
    See Also:
    
    Constant Field Values
  - EXCEPTION_CLASS
```
static final String EXCEPTION_CLASS
```
    The name of the exception type. Must be equal to the name of the class of the exception in the event property EXCEPTION. The type of the value for this event property is String.
    
    Since:
    
    1.1
    
    See Also:
    
    Constant Field Values
  - EXCEPTION_MESSAGE
```
static final String EXCEPTION_MESSAGE
```
    The exception message. Must be equal to the result of calling getMessage() on the exception in the event property EXCEPTION. The type of the value for this event property is String.
    
    See Also:
    
    Constant Field Values
  - MESSAGE
```
static final String MESSAGE
```
    A human-readable message that is usually not localized. The type of the value for this event property is String.
    
    See Also:
    
    Constant Field Values
  - SERVICE
```
static final String SERVICE
```
    A service reference. The type of the value for this event property is ServiceReference.
    
    See Also:
    
    Constant Field Values
  - SERVICE_ID
```
static final String SERVICE_ID
```
    A service's id. The type of the value for this event property is Long.
    
    See Also:
    
    Constant Field Values
  - SERVICE_OBJECTCLASS
```
static final String SERVICE_OBJECTCLASS
```
    A service's objectClass. The type of the value for this event property is String[].
    
    See Also:
    
    Constant Field Values
  - SERVICE_PID
```
static final String SERVICE_PID
```
    A service's persistent identity. The type of the value for this event property is String or Collection of String.
    
    See Also:
    
    Constant Field Values
  - TIMESTAMP
```
static final String TIMESTAMP
```
    The time when the event occurred, as reported by System.currentTimeMillis(). The type of the value for this event property is Long.
    
    See Also:
    
    Constant Field Values
  - EVENT_ADMIN_IMPLEMENTATION
```
static final String EVENT_ADMIN_IMPLEMENTATION
```
    The name of the implementation capability for the Event Admin specification
    
    Since:
    
    1.4
    
    See Also:
    
    Constant Field Values
  - EVENT_ADMIN_SPECIFICATION_VERSION
```
static final String EVENT_ADMIN_SPECIFICATION_VERSION
```
    The version of the implementation capability for the Event Admin specification
    
    Since:
    
    1.4
    
    See Also:
    
    Constant Field Values
  - EXECPTION_CLASS
```
static final String EXECPTION_CLASS
```
    Deprecated. As of 1.1. Replaced by EXCEPTION_CLASS.
    
    This constant was released with an incorrectly spelled name. It has been replaced by EXCEPTION_CLASS
    
    See Also:
    
    Constant Field Values

Interface EventConstants

Field Summary

Field Detail

EVENT_TOPIC

EVENT_FILTER

EVENT_DELIVERY

DELIVERY_ASYNC_ORDERED

DELIVERY_ASYNC_UNORDERED

BUNDLE_SIGNER

BUNDLE_SYMBOLICNAME

BUNDLE_ID

BUNDLE

BUNDLE_VERSION

EVENT

EXCEPTION

EXCEPTION_CLASS

EXCEPTION_MESSAGE

MESSAGE

SERVICE

SERVICE_ID

SERVICE_OBJECTCLASS

SERVICE_PID

TIMESTAMP

EVENT_ADMIN_IMPLEMENTATION

EVENT_ADMIN_SPECIFICATION_VERSION

EXECPTION_CLASS