Advanced Connection Pool Properties in Deployment Descriptors

Payara Server Community supports setting advanced JDBC connection pool properties directly on data source definitions made with the @DataSourceDefinition annotation or directly on deployment descriptors.

Setting properties in the deployment descriptor

In a Java EE 7 application, a data source definition can be added to a deployment descriptor of an application. For a web application, you would this in the standard web.xml deployment descriptor. To set advanced properties just add a property element as shown in the following example:

Setting properties on the @DataSourceDefinition annotation.

In Java EE 7 applications, a JDBC data source can be deployed by adding the @DataSourceDefinition annotation to a managed component (like and @Stateless EJB bean for example). To configure advanced JDBC properties, use the properties attribute of the annotation to define an array of the properties to configure:

@DataSourceDefinition(
    name = "java:app/MyApp/MyDS",
    className = "org.h2.jdbcx.JdbcDataSource",
    url = "jdbc:h2:mem:test",
    properties = {"fish.payara.is-connection-validation-required=true"})
<data-source>
    <name>java:global/ExampleDataSource</name>
    <class-name>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</class-name>
    <server-name>localhost</server-name>
    <port-number>3306</port-number>
    <database-name>mysql</database-name>
    <user>test</user>
    <password>test</password>
    <!-- Example of how to use a Payara specific custom connection pool setting -->
    <property>
       <name>fish.payara.is-connection-validation-required</name>
       <value>true</value>
    </property>
</data-source>

Full List of Properties

The complete list of configurable properties is the following:

Property Value Type Default Notes

fish.payara.is-connection-validation-required

Boolean

false

true - Validate connections, allow server to reconnect in case of failure

fish.payara.connection-validation-method

String

The method of connection validation table, autocommit, meta-data, custom-validation

fish.payara.validation-table-name

String

The name of the table used for validation if the validation method is set to table

fish.payara.validation-classname

String

The name of the custom class used for validation if the validation-method is set to custom-validation

fish.payara.fail-all-connections

Boolean

false

Close all connections and reconnect on failure, otherwise reconnect only when used

fish.payara.allow-non-component-callers

Boolean

false

Enable the pool to be used by non-component callers such as Servlet Filters

fish.payara.validate-atmost-once-period-in-seconds

Number

0

Specifies the time interval in seconds between successive requests to validate a connection at most once. Default value is 0, which means the attribute is not enabled.

fish.payara.connection-leak-timeout-in-seconds

Number

0

0 implies no connection leak detection

fish.payara.connection-leak-reclaim

Boolean

false

If enabled, leaked connection will be reclaimed by the pool after connection leak timeout occurs

fish.payara.connection-creation-retry-attempts

Number

0

Number of attempts to create a new connection. 0 implies no retries

fish.payara.connection-creation-retry-interval-in-seconds

Number

10

Time interval between retries while attempting to create a connection. Effective when Creation Retry Attempts is greater than 0.

fish.payara.statement-timeout-in-seconds

Number

-1

Timeout property of a connection to enable termination of abnormally long running queries. -1 implies that it is not enabled.

fish.payara.lazy-connection-enlistment

Boolean

false

Enlist a resource to the transaction only when it is actually used in a method

fish.payara.lazy-connection-association

Boolean

false

Connections are lazily associated when an operation is performed on them

fish.payara.associate-with-thread

Boolean

false

When the same thread is in need of a connection, it can reuse the connection already associated with that thread

fish.payara.pooling

Boolean

true

When set to false, disables connection pooling for the pool

fish.payara.statement-cache-size

Number

0

Caching is enabled when set to a positive non-zero value (for example, 10)

fish.payara.match-connections

Boolean

true

Turns connection matching for the pool on or off

fish.payara.max-connection-usage-count

Number

0

Connections will be reused by the pool for the specified number of times, after which they will be closed. 0 implies the feature is not enabled.

fish.payara.wrap-jdbc-objects

Boolean

true

When set to true, application will get wrapped jdbc objects for Statement, PreparedStatement, CallableStatement, ResultSet, DatabaseMetaData

fish.payara.sql-trace-listeners

String

Comma-separated list of classes that implement the org.glassfish.api.jdbc.SQLTraceListener interface

fish.payara.ping

Boolean

false

When enabled, the pool is pinged during creation or reconfiguration to identify and warn of any erroneous values for its attributes

fish.payara.init-sql

String

Specify a SQL string to be executed whenever a connection is created from the pool

fish.payara.statement-leak-timeout-in-seconds

Number

0

0 implies no statement leak detection

fish.payara.statement-leak-reclaim

Boolean

false

If enabled, leaked statement will be reclaimed by the pool after statement leak timeout occurs

fish.payara.statement-cache-type

String

fish.payara.slow-query-threshold-in-seconds

Number

-1

SQL queries that exceed this time in seconds will be logged. Any value ⇐ 0 disables Slow Query Logging

fish.payara.log-jdbc-calls

Boolean

false

When set to true, all JDBC calls will be logged allowing tracing of all JDBC interactions including SQL

Example Data source configuration

An example data source configured on the web.xml and deployed with a custom SQL Trace Listener is shown below. This data source is configured to also validate all connections returned from the connection pool before giving them to the application using the built-in MySQL Connection Validation class. The data source is also configured to log any queries that exceed 5 seconds and also logs ALL JDBC statements:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
     version="3.1">
    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>
    <data-source>
      <name>java:global/ExampleDataSource</name>
      <class-name>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</class-name>
      <server-name>localhost</server-name>
      <port-number>3306</port-number>
      <database-name>mysql</database-name>
      <user>test</user>
      <password>test</password>
      <!-- Example of how to use a Payara specific custom connection pool setting -->
      <property>
          <name>fish.payara.slow-query-threshold-in-seconds</name>
          <value>5</value>
      </property>
      <property>
          <name>fish.payara.log-jdbc-calls</name>
          <value>true</value>
      </property>
      <property>
          <name>fish.payara.sql-trace-listeners </name>
          <value>fish.payara.examples.payaramicro.datasource.example.CustomSQLTracer</value>
      </property>
      <property>
          <name>fish.payara.is-connection-validation-required</name>
          <value>true</value>
      </property>
      <property>
          <name>fish.payara.connection-validation-method</name>
          <value>custom-validation</value>
      </property>
      <property>
          <name>fish.payara.validation-classname</name>
          <value>org.glassfish.api.jdbc.validation.MySQLConnectionValidation</value>
      </property>
    </data-source>
</web-app>