The EntireX Java RPC Server is an RPC server which runs Java server interface objects generated from your IDL files. This server can register an Attach Service to start several services with the same server address on demand.
Each of these services can process one call at a time. The Java RPC Server is started by a script, which you may customize. Parameters for the server are configured in a Java properties file.
This document covers the following topics:
The script files that start the Java RPC Server allow command-line options as described in the table below. Alternatively, you can use System properties or a property file. The command-line option has the highest priority; the System property has second priority, and the entries of a property file have third priority.
The Java RPC Server can adjust the number of worker threads to
the number of parallel requests. Use the properties
entirex.server.fixedservers,
entirex.server.maxservers and
entirex.server.minservers to configure this
scalability. If entirex.server.fixedservers=yes, the number of
servers specified in entirex.server.minservers is
started and the server can process this number of parallel requests. If
entirex.server.fixedservers=no, the number of worker threads
balances between what is specified in
entirex.server.minservers and what is specified in
entirex.server.maxservers. This is done by a
so-called attach server thread. At startup, the number of worker threads is the
number specified in entirex.server.minservers. A
new worker thread starts if the Broker has more requests than there are worker
threads waiting. If more than the number specified in
entirex.server.minservers are waiting for
requests, a worker thread stops if its receive call times out. The timeout
period is configured with
entirex.server.waitserver.
The default name of the properties file is
entirex.server.properties. It can be changed by
assigning an arbitrary file name with a path to a Java system property with the
name entirex.server.properties. The file is
searched for in the directory of the start script.
An example for the properties file is in subfolder config of the installation folder.
Under UNIX:
java -Dentirex.server.properties=rpcserver.properties -classpath <entirex.jar with path>:<path to your server stubs> com.softwareag.entirex.aci.RPCServer
| Name | Command-line Option | Default Value | Explanation | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| entirex.rpcserver.packagename.entirex. rpcserver.packagename.<libraryname>=packagename<libraryname>=packagename |
See Using Package Names with the Java RPC Server. | ||||||||||||||||||
| entirex.server.brokerid | -broker | localhost | Broker ID | ||||||||||||||||
| entirex.server.codepage | -codepage | The codepage the server uses. Permitted values are the name of the codepages the JVM supports. See Customizing the Java RPC Server for details. | |||||||||||||||||
| entirex.server.compresslevel | -compresslevel | 0 (no compression) |
|
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| entirex.server.customclass | -customclass | This class is used for custom initialization and shutdown of the
server. In addition, this class allows handling when closing a conversation and
handling the termination of a worker thread. See ServerImplementation for more information.
|
|||||||||||||||||
| entirex.server.encryptionlevel | -encryption | 0 | Encryption level (if Broker is version 6.1.1 or higher. Valid values: 0,1,2). | ||||||||||||||||
| entirex.server.environment | Can be used in a user-written translation exit of the Broker.
See BrokerService, setEnvironment(java.lang.String) (EntireX Java ACI).
|
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| entirex.server.fixedservers | no | If no, use attach server to manage worker threads, otherwise run minimum number of server threads. | |||||||||||||||||
| entirex.server.logfile | -logfile | Path and name of the trace output file. Environment variables in the name are resolved only if used as command-line option. | |||||||||||||||||
| entirex.server.maxservers | 32 | Maximum number of worker threads. | |||||||||||||||||
| entirex.server.minservers | 1 | Minimum number of server threads. | |||||||||||||||||
| entirex.server.monitorport | -smhport | 0 | The port where the server listens for commands from the System Management Hub (SMH). If this port is 0, no port is used and management by the SMH is disabled. | ||||||||||||||||
| entirex.server.name | The name of the server. | ||||||||||||||||||
| entirex.server.password | -password | The password for secured access to the Broker. The password is encrypted and written to the property
entirex.server.password.e. To change the password, set the new password in the properties file (default is entirex.server.properties). To disable password encryption, set entirex.server.passwordencrypt=no.
Default for this property is yes. |
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| entirex.server.properties | -propertyfile | entirex.server.properties | The file name of the property file. | ||||||||||||||||
| entirex.server.restartcycles | -restartcycles | 15 | Number of restart attempts if the Broker is not available. This can be used to keep the Java RPC Server running while the Broker is down for a short time. | ||||||||||||||||
| entirex.server.security | -security | no | no/yes/auto/Name of BrokerSecurity object. | ||||||||||||||||
| entirex.server.serveraddress | -server | RPC/SRV1/CALLNAT | Server address | ||||||||||||||||
| entirex.server.serverlog | -serverlog | Name of the file where start and stop of worker threads is logged. Used by the Windows RPC Service. | |||||||||||||||||
| entirex.server.userid | -user | JavaServer | The user ID for the Broker for RPC. See entirex.server.password . | ||||||||||||||||
| entirex.server.verbose | -verbose | no | Verbose output to standard output yes/no. | ||||||||||||||||
| entirex.server.waitattach | 600S | Wait timeout for the attach server thread. | |||||||||||||||||
| entirex.server.waitserver | 300S | Wait timeout for the worker threads. | |||||||||||||||||
| entirex.timeout | 20 | TCP/IP transport timeout. See Setting the Transport Timeout under Writing Advanced Applications - EntireX Java ACI. | |||||||||||||||||
| entirex.trace | -trace | 0 | Trace level (1,2,3). | ||||||||||||||||
A package name can be specified when the server is generated.
The Java RPC Server can handle server programs with package
names if the package name of each library is configured in the properties of
the server. For each library the property
entirex.rpcserver.packagename.<library> has
the value of the package.
Example for the library Example (as in example.idl):
entirex.rpcserver.packagename.example=my.package
The library name must be lowercase.
It is assumed that you have read the document Internationalization with EntireX and are familiar with the various internationalization approaches described there.
With the parameter codepage for the Java RPC Server you can
override the encoding used for the payload sent to / received from the broker. Instead of using the default encoding of the JVM, the given encoding is used. Using this method does not change the default encoding of your JVM.
force a locale string to be sent if communicating with broker version 7.1.x and below. You can use the abstract codepage name LOCAL to send the default encoding of the JVM to the broker. See Using the Abstract Codepage Name LOCAL.
EntireX Java components use the codepage configured for the Java virtual machine (JVM) to convert the Unicode (UTF-16) representation within Java to the multibyte or single-byte encoding sent to or received from the broker by default. This codepage is also transferred as part of the locale string to tell the broker the encoding of the data if communicating with a broker version 7.2.x and above.
To change the default, see your JVM documentation. On some JVM
implementations, it can be changed with the
file.encoding property. On some
UNIX implementations, it can be changed with the
LANG environment variable.
Which encodings are valid depends on the version of your JVM. For a list of valid encodings, see Supported Encodings in your Java documentation. The encoding must also be a supported codepage of the broker, depending on the internationalization approach.
To start the Java RPC Server
Use a shell script in the subfolder bin of the installation directory.
On UNIX, the shell script is named jrpcserver.bsh.
If the Java interpreter is not called "java", change the call to "java".
You can set the environment variable JAVA_HOME for the location of the Java interpreter.
Set the classpath to "entirex.jar" and the path to the generated proxies.
The Java RPC Server accepts parameters. See column Command-line options in table above.
To stop the Java RPC Server
Use the function Deregister a Service or Deregister a Server of the System Management Hub. This method ensures that the deregistration from the Broker is correct.
The application identification is sent from the RPC server to the Broker. It is visible with Broker Command and Info Services.
The identification consists of four parts: name, node, type, and version. These four parts are sent with each Broker call and are visible in the trace information.
For the Java RPC Server these values are:
| Identification Part | Value |
|---|---|
| Application name: | ANAME=Java RPC Server |
| Node name: | ANODE=<host name> |
| Application type: | ATYPE=Java |
| Version: | AVERS=8.2.0.0 |
