Chapter 61. Spring JDBC
Chapter 61. Spring JDBC Since Camel 3.10 Only producer is supported The Spring JDBC component is an extension of the JDBC component with one additional feature to integrate with Spring Transaction Manager. For general use of this component then see the JDBC Component . Maven users must add the following dependency to their pom.xml for this component: <dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-spring-jdbc-starter</artifactId> </dependency> The version is specified using BOM in the following way. <dependencyManagement> <dependencies> <dependency> <groupId>com.redhat.camel.springboot.platform</groupId> <artifactId>camel-spring-boot-bom</artifactId> <version>USD{camel-spring-boot-version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> 61.1. Configuring Options Camel components are configured on two separate levels: component level endpoint level <dependencyManagement> <dependencies> <dependency> <groupId>com.redhat.camel.springboot.platform</groupId> <artifactId>camel-spring-boot-bom</artifactId> <version>USD{camel-spring-boot-version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> 61.2. Configuring Options Camel components are configured on two separate levels: 61.3. Configuring Options Camel components are configured on two levels: Component level Endpoint level 61.3.1. Component Level Options The component level is the highest level. The configurations you define at this level are inherited by all the endpoints. For example, a component can have security settings, credentials for authentication, urls for network connection, and so on. Since components typically have pre-configured defaults for the most common cases, you may need to only configure a few component options, or maybe none at all. You can configure components with Component DSL in a configuration file (application.properties|yaml), or directly with Java code. 61.3.2. Endpoint Level Options At the Endpoint level you have many options, which you can use to configure what you want the endpoint to do. The options are categorized according to whether the endpoint is used as a consumer (from) or as a producer (to) or used for both. You can configure endpoints directly in the endpoint URI as path and query parameters. You can also use Endpoint DSL and DataFormat DSL as type safe ways of configuring endpoints and data formats in Java. When configuring options, use Property Placeholders for urls, port numbers, sensitive information, and other settings. Placeholders allows you to externalize the configuration from your code, giving you more flexible and reusable code. 61.4. Component Options The Spring JDBC component supports 4 options that are listed below. Name Description Default Type dataSource (producer) To use the DataSource instance instead of looking up the data source by name from the registry. DataSource lazyStartProducer (producer) Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. false boolean autowiredEnabled (advanced) Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. true boolean connectionStrategy (advanced) To use a custom strategy for working with connections. Do not use a custom strategy when using the spring-jdbc component because a special Spring ConnectionStrategy is used by default to support Spring Transactions. ConnectionStrategy 61.5. Endpoint Options The Spring JDBC endpoint is configured using URI syntax: Following are the path and query parameters: 61.5.1. Path Parameters (1 parameters) Name Description Default Type dataSourceName (producer) Required Name of DataSource to lookup in the Registry. If the name is dataSource or default, then Camel will attempt to lookup a default DataSource from the registry, meaning if there is a only one instance of DataSource found, then this DataSource will be used. String 61.5.2. Query Parameters (14 parameters) Name Description Default Type allowNamedParameters (producer) Whether to allow using named parameters in the queries. true boolean outputClass (producer) Specify the full package and class name to use as conversion when outputType=SelectOne or SelectList. String outputType (producer) Determines the output the producer should use. Enum values: SelectOne SelectList StreamList SelectList JdbcOutputType parameters (producer) Optional parameters to the java.sql.Statement. For example to set maxRows, fetchSize etc. Map readSize (producer) The default maximum number of rows that can be read by a polling query. The default value is 0. int resetAutoCommit (producer) Camel will set the autoCommit on the JDBC connection to be false, commit the change after executed the statement and reset the autoCommit flag of the connection at the end, if the resetAutoCommit is true. If the JDBC connection doesn't support to reset the autoCommit flag, you can set the resetAutoCommit flag to be false, and Camel will not try to reset the autoCommit flag. When used with XA transactions you most likely need to set it to false so that the transaction manager is in charge of committing this tx. true boolean transacted (producer) Whether transactions are in use. false boolean useGetBytesForBlob (producer) To read BLOB columns as bytes instead of string data. This may be needed for certain databases such as Oracle where you must read BLOB columns as bytes. false boolean useHeadersAsParameters (producer) Set this option to true to use the prepareStatementStrategy with named parameters. This allows to define queries with named placeholders, and use headers with the dynamic values for the query placeholders. false boolean useJDBC4ColumnNameAndLabelSemantics (producer) Sets whether to use JDBC 4 or JDBC 3.0 or older semantic when retrieving column name. JDBC 4.0 uses columnLabel to get the column name where as JDBC 3.0 uses both columnName or columnLabel. Unfortunately JDBC drivers behave differently so you can use this option to work out issues around your JDBC driver if you get problem using this component This option is default true. true boolean lazyStartProducer (producer (advanced)) Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. false boolean beanRowMapper (advanced) To use a custom org.apache.camel.component.jdbc.BeanRowMapper when using outputClass. The default implementation will lower case the row names and skip underscores, and dashes. For example CUST_ID is mapped as custId. BeanRowMapper connectionStrategy (advanced) To use a custom strategy for working with connections. Do not use a custom strategy when using the spring-jdbc component because a special Spring ConnectionStrategy is used by default to support Spring Transactions. ConnectionStrategy prepareStatementStrategy (advanced) Allows the plugin to use a custom org.apache.camel.component.jdbc.JdbcPrepareStatementStrategy to control preparation of the query and prepared statement. JdbcPrepareStatementStrategy 61.6. Spring Boot Auto-Configuration When using spring-jdbc with Spring Boot use the following Maven dependency to have support for auto configuration: <dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-spring-jdbc-starter</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency> The component supports 4 options that are listed below. Name Description Default Type camel.component.spring-jdbc.autowired-enabled Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. true Boolean camel.component.spring-jdbc.connection-strategy To use a custom strategy for working with connections. Do not use a custom strategy when using the spring-jdbc component because a special Spring ConnectionStrategy is used by default to support Spring Transactions. The option is a org.apache.camel.component.jdbc.ConnectionStrategy type. ConnectionStrategy camel.component.spring-jdbc.enabled Whether to enable auto configuration of the spring-jdbc component. This is enabled by default. Boolean camel.component.spring-jdbc.lazy-start-producer Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. false Boolean
<dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-spring-jdbc-starter</artifactId> </dependency> <dependencyManagement> <dependencies> <dependency> <groupId>com.redhat.camel.springboot.platform</groupId> <artifactId>camel-spring-boot-bom</artifactId> <version>USD{camel-spring-boot-version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencyManagement> <dependencies> <dependency> <groupId>com.redhat.camel.springboot.platform</groupId> <artifactId>camel-spring-boot-bom</artifactId> <version>USD{camel-spring-boot-version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> spring-jdbc:dataSourceName <dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-spring-jdbc-starter</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency>