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20.2. Enabling HA with Static Failover
Overview Copiar o linkLink copiado para a área de transferência!
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To enable HA with static failover, you must do the following:
Encode replica details in your service WSDL file Copiar o linkLink copiado para a área de transferência!
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You must encode the details of the replicas in your cluster in your service WSDL file. Example 20.1, “Enabling HA with Static Failover: WSDL File” shows a WSDL file extract that defines a service cluster of three replicas.
Example 20.1. Enabling HA with Static Failover: WSDL File
1<wsdl:service name="ClusteredService">
2 <wsdl:port binding="tns:Greeter_SOAPBinding" name="Replica1">
<soap:address location="http://localhost:9001/SoapContext/Replica1"/>
</wsdl:port>
3 <wsdl:port binding="tns:Greeter_SOAPBinding" name="Replica2">
<soap:address location="http://localhost:9002/SoapContext/Replica2"/>
</wsdl:port>
4 <wsdl:port binding="tns:Greeter_SOAPBinding" name="Replica3">
<soap:address location="http://localhost:9003/SoapContext/Replica3"/>
</wsdl:port>
</wsdl:service>
The WSDL extract shown in Example 20.1, “Enabling HA with Static Failover: WSDL File” can be explained as follows:
- 1
- Defines a service,
ClusterService, which is exposed on three ports:Replica1Replica2Replica3
- 2
- Defines
Replica1to expose theClusterServiceas a SOAP over HTTP endpoint on port9001. - 3
- Defines
Replica2to expose theClusterServiceas a SOAP over HTTP endpoint on port9002. - 4
- Defines
Replica3to expose theClusterServiceas a SOAP over HTTP endpoint on port9003.
Add the clustering feature to your client configuration Copiar o linkLink copiado para a área de transferência!
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In your client configuration file, add the clustering feature as shown in Example 20.2, “Enabling HA with Static Failover: Client Configuration”.
Example 20.2. Enabling HA with Static Failover: Client Configuration
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xmlns:clustering="http://cxf.apache.org/clustering"
xsi:schemaLocation="http://cxf.apache.org/jaxws
http://cxf.apache.org/schemas/jaxws.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<jaxws:client name="{http://apache.org/hello_world_soap_http}Replica1"
createdFromAPI="true">
<jaxws:features>
<clustering:failover/>
</jaxws:features>
</jaxws:client>
<jaxws:client name="{http://apache.org/hello_world_soap_http}Replica2"
createdFromAPI="true">
<jaxws:features>
<clustering:failover/>
</jaxws:features>
</jaxws:client>
<jaxws:client name="{http://apache.org/hello_world_soap_http}Replica3"
createdFromAPI="true">
<jaxws:features>
<clustering:failover/>
</jaxws:features>
</jaxws:client>
</beans>