maja
April 24, 2018, 3:03pm
1
Hello,
Camunda BPM: (v7.8.0)
Camunda BPM Spring Boot Starter: (v2.3.0)
Now I need one common web console to administrate those engines instances (view tasks/processes, etc.)
I tried with “configuration file” as is shown in documentation:
But it doesn’t work (no menu where will be engines to select one of them)
It is possible to configure SpringBoot server: camunda-bpm-spring-boot-starter-webapp that will be access to multiple engines? Where put information about those external engines - in file application.yaml?
Regards,
1 Like
maja
April 25, 2018, 12:51pm
2
I found solution by try and error method (for tomcat configuration):
<process-engine name="myEngine1">
<datasource>java:jdbc/ProcessEngine1</datasource>
…
</process-engine>
<process-engine name="myEngine2">
<datasource>java:jdbc/ProcessEngine2</datasource>
…
</process-engine>
In file server.xml (located in tomcat conf folder) I defined Data Sources:
<Resource name="jdbc/ProcessEngine1" …>
<Resource name="jdbc/ProcessEngine2" …>
And now I have one administration console for two process Engines.
4 Likes
Thanks for sharing the solution.
For those of you working in WildFly, the following worked for me for Camunda 7.8.0-ee, WildFly 10.1.0, MySQL 5.7.25, and MySQL driver 8.0.15. Note that I am using two separate database servers, which increases the overall throughput. I’m sure there are ways to further optimize this.
You would need some mechanism, however, to redirect traffic to one engine or the other. In a typical process start URL, you would change the engine name element. Example:
Normal “default” Process Engine:
http://myhost.mydomain.com:8880/engine-rest/engine/default/process-definition/key/myProcess/start
Second Process Engine:
http://myhost.mydomain.com:8880/engine-rest/engine/engine_2/process-definition/key/myProcess/start
When I ran processes against both, records showed up in the different databases, but the GUI and other reporting would be accessed at a single point.
Following are configuration sections from the WildFly standalone.xml file. Adjust as needed.
Process Engines:
<subsystem xmlns="urn:org.camunda.bpm.jboss:1.1">
<process-engines>
<process-engine name="default" default="true">
<datasource>java:jboss/datasources/ProcessEngine</datasource>
<history-level>full</history-level>
<properties>
<property name="jobExecutorAcquisitionName">
default
</property>
<property name="isAutoSchemaUpdate">
false
</property>
<property name="authorizationEnabled">
true
</property>
<property name="jobExecutorDeploymentAware">
true
</property>
<property name="historyCleanupBatchWindowStartTime">
00:01
</property>
</properties>
<plugins>
<plugin>
<class>org.camunda.bpm.application.impl.event.ProcessApplicationEventListenerPlugin</class>
</plugin>
<plugin>
<class>org.camunda.spin.plugin.impl.SpinProcessEnginePlugin</class>
</plugin>
<plugin>
<class>org.camunda.connect.plugin.impl.ConnectProcessEnginePlugin</class>
</plugin>
</plugins>
</process-engine>
<process-engine name="engine_2">
<datasource>java:jboss/datasources/ProcessEngine_2</datasource>
<history-level>full</history-level>
<properties>
<property name="jobExecutorAcquisitionName">
engine_2
</property>
<property name="isAutoSchemaUpdate">
false
</property>
<property name="authorizationEnabled">
true
</property>
<property name="jobExecutorDeploymentAware">
true
</property>
<property name="historyCleanupBatchWindowStartTime">
00:01
</property>
</properties>
</properties>
<plugins>
<plugin>
<class>org.camunda.bpm.application.impl.event.ProcessApplicationEventListenerPlugin</class>
</plugin>
<plugin>
<class>org.camunda.spin.plugin.impl.SpinProcessEnginePlugin</class>
</plugin>
<plugin>
<class>org.camunda.connect.plugin.impl.ConnectProcessEnginePlugin</class>
</plugin>
</plugins>
</process-engine>
</process-engines>
<job-executor>
<core-threads>16</core-threads>
<max-threads>320</max-threads>
<queue-length>640</queue-length>
<job-acquisitions>
<job-acquisition name="default">
<properties>
<property name="lockTimeInMillis">
300000
</property>
<property name="waitTimeInMillis">
5000
</property>
<property name="maxJobsPerAcquisition">
36
</property>
<property name="backoffTimeInMillis">
90
</property>
<property name="maxBackoff">
450
</property>
</properties>
</job-acquisition>
<job-acquisition name="engine_2">
<properties>
<property name="lockTimeInMillis">
300000
</property>
<property name="waitTimeInMillis">
5000
</property>
<property name="maxJobsPerAcquisition">
36
</property>
<property name="backoffTimeInMillis">
90
</property>
<property name="maxBackoff">
450
</property>
</properties>
</job-acquisition>
</job-acquisitions>
</job-executor>
</subsystem>
Data Sources
<subsystem xmlns="urn:jboss:domain:datasources:4.0">
<datasources>
<datasource jta="true" jndi-name="java:jboss/datasources/ProcessEngine" pool-name="ProcessEngine" enabled="true" use-java-context="true" use-ccm="true" statistics-enabled="true">
<connection-url>jdbc:mysql://mysql_S_1.domain.com:3306/camunda_db?autoReconnectForPools=true</connection-url>
<driver>mysql</driver>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>100</min-pool-size>
<initial-pool-size>100</initial-pool-size>
<max-pool-size>500</max-pool-size>
</pool>
<security>
<user-name>camunda</user-name>
<password>campass</password>
</security>
<validation>
<valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/>
<background-validation>true</background-validation>
<background-validation-millis>2000</background-validation-millis>
<stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.StaleConnectionChecker"/>
<exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/>
</validation>
<timeout>
<set-tx-query-timeout>false</set-tx-query-timeout>
<blocking-timeout-millis>0</blocking-timeout-millis>
<idle-timeout-minutes>0</idle-timeout-minutes>
<query-timeout>0</query-timeout>
<use-try-lock>0</use-try-lock>
<allocation-retry>0</allocation-retry>
<allocation-retry-wait-millis>0</allocation-retry-wait-millis>
</timeout>
<statement>
<share-prepared-statements>false</share-prepared-statements>
</statement>
</datasource>
<datasource jta="true" jndi-name="java:jboss/datasources/ProcessEngine_2" pool-name="ProcessEngine_2" enabled="true" use-java-context="true" use-ccm="true" statistics-enabled="true">
<connection-url>jdbc:mysql://mysql_S_2:3306/camunda_db&autoReconnectForPools=true</connection-url>
<driver>mysql</driver>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>100</min-pool-size>
<initial-pool-size>100</initial-pool-size>
<max-pool-size>500</max-pool-size>
</pool>
<security>
<user-name>camunda</user-name>
<password>campass</password>
</security>
<validation>
<valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/>
<background-validation>true</background-validation>
<background-validation-millis>2000</background-validation-millis>
<stale-connection-checker class-name="org.jboss.jca.adapters.jdbc.StaleConnectionChecker"/>
<exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/>
</validation>
<timeout>
<set-tx-query-timeout>false</set-tx-query-timeout>
<blocking-timeout-millis>0</blocking-timeout-millis>
<idle-timeout-minutes>0</idle-timeout-minutes>
<query-timeout>0</query-timeout>
<use-try-lock>0</use-try-lock>
<allocation-retry>0</allocation-retry>
<allocation-retry-wait-millis>0</allocation-retry-wait-millis>
</timeout>
<statement>
<share-prepared-statements>false</share-prepared-statements>
</statement>
</datasource>
<drivers>
<driver name="mysql" module="com.mysql">
<driver-class>com.mysql.cj.jdbc.Driver</driver-class>
</driver>
</drivers>
</datasources>
1 Like
Is a configuration possible, to use custom ports for the processEngines ?
