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CHAPTER 20
Creating Pramati Server Clusters Using XMLs
2 Define the name of the cluster. Open the server-config.xml file and add a declaration as
follows:
<belongs-to-cluster> MyCluster </belongs-to-cluster>
3 Enable the cluster service. This cluster name is a logical representation for a group of nodes
enabling them to communicate with each other. Once the node is identified as part of a cluster,
the service definition for the cluster can be added in the
server-config.xml file as follows:
<service name="ClusterService" enabled="true"
class-name="com.pramati.cluster.PramatiClusterService">
<config-file>cluster-config.xml</config-file>
<requires always="NamingService" />
</service>
Set the 'enabled' attribute to true, so the cluster service is started when the services framework is
started. As you can infer from the above code snippet, the actual configuration file for the cluster
is stored by every node in
cluster-config.xml.
Note: Though at present the nodes interact with each other through a repository of IP and port
information, it is important that the nodes identify themselves with a common name.
4 Setup persistence. The services configuration in a node can be stored either in a file or a database.
The information can be specified in
server-config.xml under <configuration-
persistence> tag as shown in the code snippet below. By default all the configuration
information are persisted to the file.
<configuration-persistence use="file">
<persistence type="file" />
<persistence type="db">
<property name="driver" value="" />
<property name="url" value="" />
<property name="user" value="" />
<property name="password" value="" />
<property name="tablename" value="" />
</persistence>
</configuration-persistence>
Persistence can be configured either at the file level or DB level. For DB level persistence, connection
parameters like driver, connection URL, username, password and table name can be specified in the
configuration file, which are persisted. A driver can be any valid JDBC driver and varies for different
databases. The 'tablename' attribute is used to create a specific table where the configuration details
for all the services are stored.
If you are setting up a new cluster, you can opt for a file level persistence, where the DB is not used
for aiding a synch-up. The new version of Server supports an 'On Demand sync up', wherein the
configuration information for each node are synched up with every other node and persisted in the
DB.
- Pramati Server 4.1 1
- Document Conventions 9
- Contact Information 9
- Pramati Server 11
- Software Requirements 12
- Database Requirements 12
- Using JDK 13
- Using JRE 13
- Getting Server Install File 15
- Receiving License Key 16
- Upgrading License 16
- Chapter 3 17
- Platforms 19
- Chapter 4 21
- Chapter 5 25
- Installing Java Wrapper 31
- Configuring JVM Parameters 33
- Troubleshooting Tips 34
- Pramati Server Components 35
- Java Client 37
- CHAPTER 8 39
- Adding User 41
- Deleting User 42
- Changing Password 42
- Changing password for User 43
- Administration Service 45
- Using Admin Service 47
- Creating Standalone Server 48
- Configuring Standalone Server 49
- Starting Standalone Server 49
- Stopping Standalone Server 50
- Removing Standalone Server 50
- CHAPTER 11 51
- Adding a Load Balancer node 55
- Configuring Load Balancer 56
- Viewing Load Balancer details 57
- Starting Load Balancer 57
- Connecting to Load Balancer 58
- Stopping Load Balancer 58
- Removing a Load Balancer 58
- Modifying Cluster 62
- Starting Cluster 63
- Connecting to Cluster 63
- Stopping Cluster 64
- Deleting Cluster 64
- Standalone Node 65
- Using Loaded Send Queues 67
- 1 Database 69
- 2 File System 69
- CHAPTER 15 71
- Persistence Type File Store 72
- Maximum File Size 10KB 72
- Purge Interval 600 sec 72
- Property Default Value 72
- Server Admin Service 75
- Stopping Message Server node 78
- Managing Cluster Nodes 79
- Nodes Using XML 81
- Table 22: Terminology 82
- CHAPTER 18 83
- Structure of Nodes Directory 84
- Creating a Standalone Server 86
- Customizing Server Footprint 89
- Using NodeCreator with XMLs 92
- CHAPTER 19 93
- Usage Objective 95
- Cluster Definition 99
- Creating a Cluster Instance 100
- CHAPTER 20 101
- Setting up a J2EE Cluster 102
- J2EE Cluster Node Types 103
- Advanced Configuration 104
- Setting up EJB Persistence 105
- 4 Setup persistence 111
- 3 Enable Cluster service 111
- Configuring client 115
- Working with NAT firewalls 116
- Default Socket Factory 117
- Hosting Scenarios 118
- Upgrading license 119
- RemoteShell 122
- Command Line Operations 122
- Shell Commands 123
- System Properties 123
- Starting RemoteShell 124
- Handling of RARs 125
- Server-side Setup of WebStart 127
- 4 Save the file 128
- Protocols 129
- Configuration Layouts 131
- Pramati Web Server in DMZ 132
- CHAPTER 28 133
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