# Integrate flowable with spring boot **URL:** \ **Category:** Flowable Application\ **Created:** [January 11, 2019, 11:11am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222 "2019-01-11T11:11:18Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 11, 2019, 11:11am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/1 "2019-01-11T11:11:19Z")
Hello, I followed this [https://blog.flowable.org/2018/12/19/building-your-own-flowable-spring-boot-application/](https://blog.flowable.org/2018/12/19/building-your-own-flowable-spring-boot-application/) blog post to build a spring boot api, but I don’t know how to configure postgresql(the official doc is too much complicated for me), can anyone help me, I’m new to java and spring boot ---
**Author:** ![cesarcavalari](https://avatars.discourse-cdn.com/v4/letter/c/58f4c7/32.png) [@cesarcavalari](https://forum.flowable.org/u/cesarcavalari)\ **Post date:** [January 11, 2019, 3:12pm UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/2 "2019-01-11T15:12:47Z")
Hi @xcaptain, You just need to configure your data source pointing to the postgres database. You can do this setting these parameters in your application.properties or as environment variables: spring.datasource.driver-class-name=org.postgresql.Driver spring.datasource.url=jdbc:postgresql://:5432/flowable spring.datasource.username=flowable spring.datasource.password=flowable ---
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 14, 2019, 5:52am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/3 "2019-01-14T05:52:32Z")
Demo project is at [https://github.com/xcaptain/flowable-demo](https://github.com/xcaptain/flowable-demo) I added postgresql in `pom.xml` and added `FlowableConfig` which I think will load all beans defined in `flowable.cfg.xml`, but still can’t run. ```auto at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:330) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:273) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1237) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] ... 98 common frames omitted Caused by: org.flowable.common.engine.api.FlowableException: Could not update Flowable database schema: unknown version from database: '6.4.1.3' at org.flowable.common.engine.impl.FlowableVersions.getFlowableVersionIndexForDbVersion(FlowableVersions.java:146) ~[flowable-engine-common-6.4.0.jar:6.4.0] at org.flowable.engine.impl.db.ProcessDbSchemaManager.schemaUpdate(ProcessDbSchemaManager.java:184) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.SchemaOperationsProcessEngineBuild.execute(SchemaOperationsProcessEngineBuild.java:54) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.SchemaOperationsProcessEngineBuild.execute(SchemaOperationsProcessEngineBuild.java:28) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.interceptor.CommandInvoker$1.run(CommandInvoker.java:51) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:93) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:72) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:56) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.interceptor.BpmnOverrideContextInterceptor.execute(BpmnOverrideContextInterceptor.java:25) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.common.engine.impl.interceptor.TransactionContextInterceptor.execute(TransactionContextInterceptor.java:53) ~[flowable-engine-common-6.4.0.jar:6.4.0] at org.flowable.common.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:71) ~[flowable-engine-common-6.4.0.jar:6.4.0] at org.flowable.common.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:49) ~[flowable-spring-common-6.4.0.jar:6.4.0] at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140) ~[spring-tx-5.1.3.RELEASE.jar:5.1.3.RELEASE] at org.flowable.common.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:46) ~[flowable-spring-common-6.4.0.jar:6.4.0] at org.flowable.common.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:30) ~[flowable-engine-common-6.4.0.jar:6.4.0] at org.flowable.common.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:56) ~[flowable-engine-common-6.4.0.jar:6.4.0] at org.flowable.engine.impl.ProcessEngineImpl.(ProcessEngineImpl.java:78) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.engine.impl.cfg.ProcessEngineConfigurationImpl.buildProcessEngine(ProcessEngineConfigurationImpl.java:888) ~[flowable-engine-6.4.0.jar:6.4.0] at org.flowable.spring.SpringProcessEngineConfiguration.buildProcessEngine(SpringProcessEngineConfiguration.java:72) ~[flowable-spring-6.4.0.jar:6.4.0] at org.flowable.engine.spring.configurator.SpringProcessEngineConfigurator.initProcessEngine(SpringProcessEngineConfigurator.java:58) ~[flowable-spring-configurator-6.4.0.jar:6.4.0] at org.flowable.engine.spring.configurator.SpringProcessEngineConfigurator.configure(SpringProcessEngineConfigurator.java:47) ~[flowable-spring-configurator-6.4.0.jar:6.4.0] at org.flowable.common.engine.impl.AbstractEngineConfiguration.configuratorsAfterInit(AbstractEngineConfiguration.java:859) ~[flowable-engine-common-6.4.0.jar:6.4.0] at org.flowable.app.engine.AppEngineConfiguration.init(AppEngineConfiguration.java:224) ~[flowable-app-engine-6.4.0.jar:6.4.0] at org.flowable.app.engine.AppEngineConfiguration.buildAppEngine(AppEngineConfiguration.java:182) ~[flowable-app-engine-6.4.0.jar:6.4.0] at org.flowable.app.spring.SpringAppEngineConfiguration.buildAppEngine(SpringAppEngineConfiguration.java:61) ~[flowable-app-engine-spring-6.4.0.jar:6.4.0] at org.flowable.app.spring.AppEngineFactoryBean.getObject(AppEngineFactoryBean.java:59) ~[flowable-app-engine-spring-6.4.0.jar:6.4.0] at org.flowable.app.spring.AppEngineFactoryBean.getObject(AppEngineFactoryBean.java:31) ~[flowable-app-engine-spring-6.4.0.jar:6.4.0] at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE] ... 108 common frames omitted ``` I think this error log means some flowable beans can’t setup correctly, but I don’t know why. ---
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 14, 2019, 7:05am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/4 "2019-01-14T07:05:46Z")
Fixed this error in [https://github.com/xcaptain/flowable-demo/commit/85bf9fcb4ea00f358dd6f8b7cc95f91306672f7e](https://github.com/xcaptain/flowable-demo/commit/85bf9fcb4ea00f358dd6f8b7cc95f91306672f7e) it’s because I once build flowable from source, so in `act_ge_property` table, flowable version becomes `6.4.1.3`, after I upgraded `flowable-spring-boot-starter-rest` version to `6.4.1-SNAPSHOT` problem solved. ---
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 14, 2019, 7:31am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/5 "2019-01-14T07:31:13Z")
Thanks, you are right, only need to add these lines to `application.properties`, no need to add `flowable.cfg.xml` stuff. ---
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 14, 2019, 1:26pm UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/6 "2019-01-14T13:26:18Z")
I connected this spring api to existed flowable database, I can use the rest api to get process and tasks, but can’t start new process instance. the error log says: ```auto org.flowable.common.engine.api.FlowableException: Could not find org.flowable.http.HttpActivityBehavior: ``` ---
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 15, 2019, 1:29pm UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/7 "2019-01-15T13:29:03Z")
In this commit [https://github.com/xcaptain/flowable-demo/commit/517d2617c7cef8648bdc0f3a8c583f5ed828e82c](https://github.com/xcaptain/flowable-demo/commit/517d2617c7cef8648bdc0f3a8c583f5ed828e82c) after added ```xml org.flowable flowable-http 6.4.1-SNAPSHOT ``` to pom.xml, my demo app builds. Original discuss can be found at [https://github.com/flowable/flowable-engine/issues/458](https://github.com/flowable/flowable-engine/issues/458), [https://github.com/flowable/flowable-engine/pull/459/files](https://github.com/flowable/flowable-engine/pull/459/files) Would be good to add this to `flowable-spring-boot-starter-rest` package. ---
**Author:** ![xcaptain](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/xcaptain/32/1286_2.png) [@xcaptain](https://forum.flowable.org/u/xcaptain)\ **Post date:** [January 16, 2019, 7:39am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/8 "2019-01-16T07:39:24Z")
I added event listener in [https://github.com/xcaptain/flowable-demo/commit/a3eb491b7c78efce459deb08d9e15838bb0721d6](https://github.com/xcaptain/flowable-demo/commit/a3eb491b7c78efce459deb08d9e15838bb0721d6), works fine but don’t know why event listener config in `flowable.cfg.xml` doesn’t work, so I added a `EventRegisterCommandLineRunner` class to register flowable event listener at start up. ---
**Author:** ![filiphr](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/filiphr/32/315_2.png) [@filiphr](https://forum.flowable.org/u/filiphr)\ **Post date:** [January 27, 2019, 10:24am UTC](https://forum.flowable.org/t/integrate-flowable-with-spring-boot/3222/9 "2019-01-27T10:24:33Z")
When using the Spring Boot auto configuration you should not use `flowable.cfg.xml`. That resource is not used at all in the auto configuration setup. Therefore you would need to explicitly define everything you need in Java code. In your case you should do that with an `EngineConfigurationConfigurer` that way the listener will be registered before the engine starts. Cheers, Filip