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Contributed on December 8, 2022
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Integrate Red Hat Process Automation Manager with Springboot

Blog: Drools & jBPM Blog

We worked on a request to migrate RHPAM/EAP applications to RHPAM/Springboot. The following steps were adopted to help the client move into RHPAM/Springboot containers.

Environment:

Database configuration:

There are differences in the sequence configured for RHPAM/EAP application and RHPAM/Springboot applications. Please run the below script to update sequence: 

alter sequence BAM_TASK_ID_SEQ increment by 50;
alter sequence CASE_ID_INFO_ID_SEQ increment by 50;
alter sequence CONTEXT_MAPPING_INFO_ID_SEQ increment by 50;
alter sequence CORRELATION_KEY_ID_SEQ increment by 50;
alter sequence CORRELATION_PROP_ID_SEQ increment by 50;
alter sequence ERROR_INFO_ID_SEQ increment by 50;
alter sequence PROCESS_INSTANCE_INFO_ID_SEQ increment by 50;
alter sequence REQUEST_INFO_ID_SEQ increment by 50;
alter sequence SESSIONINFO_ID_SEQ increment by 50;
alter sequence TASK_DEF_ID_SEQ increment by 50;
alter sequence TASK_EVENT_ID_SEQ increment by 50;
alter sequence WORKITEMINFO_ID_SEQ increment by 50;

Update application.properties with the following properties to connect to PostgreSQL:

spring.datasource.username=jbpm
spring.datasource.password=jbpm
spring.datasource.url=jdbc:postgresql://localhost:5432/jbpm
spring.datasource.driver-class-name=org.postgresql.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=validate
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

PersistenceException is expected if the sequence is not updated and RHPAM/Springboot application tries to connect to the database: 

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/jbpm/springboot/autoconfigure/JBPMAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.domain] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=org.jbpm.services.task.impl.model.TaskDefImpl]

Caused by: org.hibernate.MappingException: The increment size of the [TASK_DEF_ID_SEQ] sequence is set to [50] in the entity mapping while the associated database sequence increment size is [1].

AMQ configuration:

Update the application.properties with the following parameters to connect to AMQ:

amqphub.amqp10jms.remoteUrl=amqp://localhost:5672
amqphub.amqp10jms.username=admin
amqphub.amqp10jms.password=admin
jms.queue.destination=request-queue

KIE Server configuration:

Update application.properties with the following properties:

server.address=0.0.0.0
server.port=8090

cxf.path=/rest

#kie server config
kieserver.serverId=sp-sb-kie-server
kieserver.serverName=sp-sb-kie-server
kieserver.location=http://localhost:8090/rest/server
kieserver.classPathContainer=true

#kie server capabilities
kieserver.drools.enabled=true
kieserver.dmn.enabled=true
kieserver.jbpm.enabled=true
kieserver.jbpmui.enabled=true
kieserver.casemgmt.enabled=true
#kieserver.prometheus.enabled=true
kieserver.swagger.enabled=true

kieserver.deployments[<n>].containerId=<container>
kieserver.deployments[<n>].alias=<alias>
kieserver.deployments[<n>].artifactId=<artifact>
kieserver.deployments[<n>].groupId=<group>
kieserver.deployments[<n>].version=<version>

#jbpm configuration
jbpm.executor.enabled=true
jbpm.executor.retries=5
jbpm.executor.interval=3
jbpm.executor.threadPoolSize=10
jbpm.executor.timeUnit=SECONDS

#transaction manager configuration
spring.jta.narayana.transaction-manager-id=1

#banner
spring.banner.location=classpath:banner.txt

narayana.transaction-manager-id=1
narayana.default-timeout=120
narayana.dbcp.enabled=true

#logging
logging.level.org.kie: INFO
logging.level.org.jbpm: ERROR

Quartz Timer Configuration:

DDL script to include DB configuration for quartz timer:

CREATE TABLE qrtz_job_details
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    JOB_NAME  VARCHAR(200) NOT NULL,
    JOB_GROUP VARCHAR(200) NOT NULL,
    DESCRIPTION VARCHAR(250) NULL,
    JOB_CLASS_NAME   VARCHAR(250) NOT NULL,
    IS_DURABLE BOOL NOT NULL,
    IS_NONCONCURRENT BOOL NOT NULL,
    IS_UPDATE_DATA BOOL NOT NULL,
    REQUESTS_RECOVERY BOOL NOT NULL,
    JOB_DATA BYTEA NULL,
    PRIMARY KEY (SCHED_NAME,JOB_NAME,JOB_GROUP)
);

CREATE TABLE qrtz_triggers
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    TRIGGER_NAME VARCHAR(200) NOT NULL,
    TRIGGER_GROUP VARCHAR(200) NOT NULL,
    JOB_NAME  VARCHAR(200) NOT NULL,
    JOB_GROUP VARCHAR(200) NOT NULL,
    DESCRIPTION VARCHAR(250) NULL,
    NEXT_FIRE_TIME BIGINT NULL,
    PREV_FIRE_TIME BIGINT NULL,
    PRIORITY INTEGER NULL,
    TRIGGER_STATE VARCHAR(16) NOT NULL,
    TRIGGER_TYPE VARCHAR(8) NOT NULL,
    START_TIME BIGINT NOT NULL,
    END_TIME BIGINT NULL,
    CALENDAR_NAME VARCHAR(200) NULL,
    MISFIRE_INSTR SMALLINT NULL,
    JOB_DATA BYTEA NULL,
    PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
    FOREIGN KEY (SCHED_NAME,JOB_NAME,JOB_GROUP)
    REFERENCES QRTZ_JOB_DETAILS(SCHED_NAME,JOB_NAME,JOB_GROUP)
);

CREATE TABLE qrtz_simple_triggers
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    TRIGGER_NAME VARCHAR(200) NOT NULL,
    TRIGGER_GROUP VARCHAR(200) NOT NULL,
    REPEAT_COUNT BIGINT NOT NULL,
    REPEAT_INTERVAL BIGINT NOT NULL,
    TIMES_TRIGGERED BIGINT NOT NULL,
    PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
    FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
    REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
);

CREATE TABLE qrtz_cron_triggers
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    TRIGGER_NAME VARCHAR(200) NOT NULL,
    TRIGGER_GROUP VARCHAR(200) NOT NULL,
    CRON_EXPRESSION VARCHAR(120) NOT NULL,
    TIME_ZONE_ID VARCHAR(80),
    PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
    FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
    REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
);

CREATE TABLE qrtz_simprop_triggers
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    TRIGGER_NAME VARCHAR(200) NOT NULL,
    TRIGGER_GROUP VARCHAR(200) NOT NULL,
    STR_PROP_1 VARCHAR(512) NULL,
    STR_PROP_2 VARCHAR(512) NULL,
    STR_PROP_3 VARCHAR(512) NULL,
    INT_PROP_1 INT NULL,
    INT_PROP_2 INT NULL,
    LONG_PROP_1 BIGINT NULL,
    LONG_PROP_2 BIGINT NULL,
    DEC_PROP_1 NUMERIC(13,4) NULL,
    DEC_PROP_2 NUMERIC(13,4) NULL,
    BOOL_PROP_1 BOOL NULL,
    BOOL_PROP_2 BOOL NULL,
    PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
    FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
    REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
);

CREATE TABLE qrtz_blob_triggers
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    TRIGGER_NAME VARCHAR(200) NOT NULL,
    TRIGGER_GROUP VARCHAR(200) NOT NULL,
    BLOB_DATA BYTEA NULL,
    PRIMARY KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP),
    FOREIGN KEY (SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
        REFERENCES QRTZ_TRIGGERS(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP)
);

CREATE TABLE qrtz_calendars
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    CALENDAR_NAME  VARCHAR(200) NOT NULL,
    CALENDAR BYTEA NOT NULL,
    PRIMARY KEY (SCHED_NAME,CALENDAR_NAME)
);

CREATE TABLE qrtz_paused_trigger_grps
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    TRIGGER_GROUP  VARCHAR(200) NOT NULL,
    PRIMARY KEY (SCHED_NAME,TRIGGER_GROUP)
);

CREATE TABLE qrtz_fired_triggers
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    ENTRY_ID VARCHAR(95) NOT NULL,
    TRIGGER_NAME VARCHAR(200) NOT NULL,
    TRIGGER_GROUP VARCHAR(200) NOT NULL,
    INSTANCE_NAME VARCHAR(200) NOT NULL,
    FIRED_TIME BIGINT NOT NULL,
    SCHED_TIME BIGINT NOT NULL,
    PRIORITY INTEGER NOT NULL,
    STATE VARCHAR(16) NOT NULL,
    JOB_NAME VARCHAR(200) NULL,
    JOB_GROUP VARCHAR(200) NULL,
    IS_NONCONCURRENT BOOL NULL,
    REQUESTS_RECOVERY BOOL NULL,
    PRIMARY KEY (SCHED_NAME,ENTRY_ID)
);

CREATE TABLE qrtz_scheduler_state
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    INSTANCE_NAME VARCHAR(200) NOT NULL,
    LAST_CHECKIN_TIME BIGINT NOT NULL,
    CHECKIN_INTERVAL BIGINT NOT NULL,
    PRIMARY KEY (SCHED_NAME,INSTANCE_NAME)
);

CREATE TABLE qrtz_locks
  (
    SCHED_NAME VARCHAR(120) NOT NULL,
    LOCK_NAME  VARCHAR(40) NOT NULL,
    PRIMARY KEY (SCHED_NAME,LOCK_NAME)
);

create index idx_qrtz_j_req_recovery on qrtz_job_details(SCHED_NAME,REQUESTS_RECOVERY);
create index idx_qrtz_j_grp on qrtz_job_details(SCHED_NAME,JOB_GROUP);

create index idx_qrtz_t_j on qrtz_triggers(SCHED_NAME,JOB_NAME,JOB_GROUP);
create index idx_qrtz_t_jg on qrtz_triggers(SCHED_NAME,JOB_GROUP);
create index idx_qrtz_t_c on qrtz_triggers(SCHED_NAME,CALENDAR_NAME);
create index idx_qrtz_t_g on qrtz_triggers(SCHED_NAME,TRIGGER_GROUP);
create index idx_qrtz_t_state on qrtz_triggers(SCHED_NAME,TRIGGER_STATE);
create index idx_qrtz_t_n_state on qrtz_triggers(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP,TRIGGER_STATE);
create index idx_qrtz_t_n_g_state on qrtz_triggers(SCHED_NAME,TRIGGER_GROUP,TRIGGER_STATE);
create index idx_qrtz_t_next_fire_time on qrtz_triggers(SCHED_NAME,NEXT_FIRE_TIME);
create index idx_qrtz_t_nft_st on qrtz_triggers(SCHED_NAME,TRIGGER_STATE,NEXT_FIRE_TIME);
create index idx_qrtz_t_nft_misfire on qrtz_triggers(SCHED_NAME,MISFIRE_INSTR,NEXT_FIRE_TIME);
create index idx_qrtz_t_nft_st_misfire on qrtz_triggers(SCHED_NAME,MISFIRE_INSTR,NEXT_FIRE_TIME,TRIGGER_STATE);
create index idx_qrtz_t_nft_st_misfire_grp on qrtz_triggers(SCHED_NAME,MISFIRE_INSTR,NEXT_FIRE_TIME,TRIGGER_GROUP,TRIGGER_STATE);

create index idx_qrtz_ft_trig_inst_name on qrtz_fired_triggers(SCHED_NAME,INSTANCE_NAME);
create index idx_qrtz_ft_inst_job_req_rcvry on qrtz_fired_triggers(SCHED_NAME,INSTANCE_NAME,REQUESTS_RECOVERY);
create index idx_qrtz_ft_j_g on qrtz_fired_triggers(SCHED_NAME,JOB_NAME,JOB_GROUP);
create index idx_qrtz_ft_jg on qrtz_fired_triggers(SCHED_NAME,JOB_GROUP);
create index idx_qrtz_ft_t_g on qrtz_fired_triggers(SCHED_NAME,TRIGGER_NAME,TRIGGER_GROUP);
create index idx_qrtz_ft_tg on qrtz_fired_triggers(SCHED_NAME,TRIGGER_GROUP);

Add the quartz properties file at src/main/resources/quartz.properties:

#============================================================================
# Configure Main Scheduler Properties
#============================================================================
org.quartz.scheduler.instanceName = SpringBootScheduler
org.quartz.scheduler.instanceId = AUTO
org.quartz.scheduler.skipUpdateCheck=true
org.quartz.scheduler.idleWaitTime=1000
#============================================================================
# Configure ThreadPool
#============================================================================
org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 5
org.quartz.threadPool.threadPriority = 5
#============================================================================
# Configure JobStore
#============================================================================
org.quartz.jobStore.misfireThreshold = 60000
org.quartz.jobStore.class=org.quartz.impl.jdbcjobstore.JobStoreCMT
org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.PostgreSQLDelegate
org.quartz.jobStore.useProperties=false
org.quartz.jobStore.dataSource=myDS
org.quartz.jobStore.nonManagedTXDataSource=notManagedDS
org.quartz.jobStore.tablePrefix=QRTZ_
org.quartz.jobStore.isClustered=true
org.quartz.jobStore.clusterCheckinInterval = 5000
#============================================================================
# Configure Datasources
#============================================================================
org.quartz.dataSource.myDS.connectionProvider.class=org.jbpm.springboot.quartz.SpringConnectionProvider
org.quartz.dataSource.myDS.dataSourceName=quartzDataSource
org.quartz.dataSource.notManagedDS.connectionProvider.class=org.jbpm.springboot.quartz.SpringConnectionProvider
org.quartz.dataSource.notManagedDS.dataSourceName=quartzNotManagedDataSource

Update the application.properties:

jbpm.quartz.enabled=true
jbpm.quartz.configuration=quartz.properties

Steps to deploy the application to OCP 4.10

  1. Create ocp-image directory outside the business-application project with the following structure:
ocp-image
|--/root
  |--/opt
    |-- /spring-service
  1. Copy JAR file to root/opt/spring-service. For example: 
cd ../business-application
cp target/business-application-1.0-SNAPSHOT.jar ../ocp-image/root/opt/spring-service/
  1. Create a Dockerfile with the following content in the directory /ocp-image/ 
FROM registry.access.redhat.com/ubi8/openjdk-11:latest
COPY root /
EXPOSE 8090
WORKDIR /opt/spring-service/
RUN chown -R jboss:root /opt/spring-service/ && chmod 777 /opt/spring-service/
CMD ["sh","-c", "java ${JAVA_OPTIONS} -Dorg.kie.server.mode=PRODUCTION -jar /opt/spring-service/<FILENAME>.jar"]
  1. Build and deploy application to OCP 4.10 
oc new-build --binary --strategy=docker --name kie-springboot
oc start-build kie-springboot --from-dir=. --follow
oc new-app kie-springboot
oc expose service/kie-springboot --port=8090

The post Integrate Red Hat Process Automation Manager with Springboot appeared first on KIE Community.

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