ServiceAnnouncement

java.lang.Object
- org.eclipse.persistence.internal.sessions.coordination.ServiceAnnouncement

```
public class ServiceAnnouncement
extends java.lang.Object
```
Purpose: A structured message object to announce a new RCM service instance becoming available
Description: This object is sent over the multicast by a service wanting to join the EclipseLink cluster. It is received by all other services subscribing to the same channel. Receipt of this announcement triggers an exchange protocol between the sending and receiving services to establish communications with all of the other services on the channel.

Constructor Summary

Constructors
Constructor	Description
`ServiceAnnouncement(byte[] bytes)`	INTERNAL: Constructor to initialize a new instance when receiving a message
`ServiceAnnouncement(ServiceId newServiceId)`	INTERNAL: Constructor to initialize a new instance when creating a message

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ServiceId`	`getServiceId()`	INTERNAL: Return the id of the service sending this announcement
`void`	`readFromBytes(byte[] bytes)`	INTERNAL: Initialize the instance fields from the serialized bytes.
`byte[]`	`toBytes()`	INTERNAL: Convert the instance attributes to serialized bytes.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ServiceAnnouncement
```
public ServiceAnnouncement(byte[] bytes)
```
    INTERNAL: Constructor to initialize a new instance when receiving a message
  - ServiceAnnouncement
```
public ServiceAnnouncement(ServiceId newServiceId)
```
    INTERNAL: Constructor to initialize a new instance when creating a message
- Method Detail
  - readFromBytes
```
public void readFromBytes(byte[] bytes)
```
    INTERNAL: Initialize the instance fields from the serialized bytes. Assumptions: - Same character converters exist on the reading and storing sides - Strings are not greater than 255 bytes (bytes, not characters) Byte storage: - 1 byte to store length of String that is to follow - String of 'length' bytes follows
  - toBytes
```
public byte[] toBytes()
```
    INTERNAL: Convert the instance attributes to serialized bytes. Assumptions: - Same character converters exist on the reading and storing sides - channel, id and converted to bytes < 256 bytes each Byte storage: - 1 byte to store length of String that is to follow - String of 'length' bytes follows
  - getServiceId
```
public ServiceId getServiceId()
```
    INTERNAL: Return the id of the service sending this announcement