第17章 Java バッチアプリケーション開発

例: pom.xml バッチ依存関係

<dependencies>
    <dependency>
        <groupId>org.jboss.spec.javax.batch</groupId>
        <artifactId>jboss-batch-api_1.0_spec</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>javax.enterprise</groupId>
        <artifactId>cdi-api</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.jboss.spec.javax.annotation</groupId>
        <artifactId>jboss-annotations-api_1.2_spec</artifactId>
        <scope>provided</scope>
    </dependency>

    <!-- Include your application's other dependencies. -->
    ...
</dependencies>

<job id="inheritance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="1.0">
    <!-- abstract step and flow -->
    <step id="step0" abstract="true">
        <batchlet ref="batchlet0"/>
    </step>

    <flow id="flow0" abstract="true">
        <step id="flow0.step1" parent="step0"/>
    </flow>

    <!-- concrete step and flow -->
    <step id="step1" parent="step0" next="flow1"/>

    <flow id="flow1" parent="flow0"/>
</job>

例: chunk-child.xml

<job id="chunk-child" xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="1.0">
    <step id="chunk-child-step" parent="chunk-parent-step" jsl-name="chunk-parent">
    </step>
</job>

例: chunk-parent.xml

<job id="chunk-parent" >
    <step id="chunk-parent-step" abstract="true">
        <chunk checkpoint-policy="item" skip-limit="5" retry-limit="5">
            <reader ref="R1"></reader>
            <processor ref="P1"></processor>
            <writer ref="W1"></writer>

            <checkpoint-algorithm ref="parent">
                <properties>
                    <property name="parent" value="parent"></property>
                </properties>
            </checkpoint-algorithm>
            <skippable-exception-classes>
                <include class="java.lang.Exception"></include>
                <exclude class="java.io.IOException"></exclude>
            </skippable-exception-classes>
            <retryable-exception-classes>
                <include class="java.lang.Exception"></include>
                <exclude class="java.io.IOException"></exclude>
            </retryable-exception-classes>
            <no-rollback-exception-classes>
                <include class="java.lang.Exception"></include>
                <exclude class="java.io.IOException"></exclude>
            </no-rollback-exception-classes>
        </chunk>
    </step>
</job>

例: Job XML ファイル

<batchlet ref="myBatchlet">
    <properties>
        <property name="number" value="10"/>
    </properties>
</batchlet>

例: アーティファクトクラス

@Named
public class MyBatchlet extends AbstractBatchlet {
    @Inject
    @BatchProperty
    int number;  // Field name is the same as batch property name.

    @Inject
    @BatchProperty (name = "number")  // Use the name attribute to locate the batch property.
    long asLong;  // Inject it as a specific data type.

    @Inject
    @BatchProperty (name = "number")
    Double asDouble;

    @Inject
    @BatchProperty (name = "number")
    private String asString;

    @Inject
    @BatchProperty (name = "number")
    BigInteger asBigInteger;

    @Inject
    @BatchProperty (name = "number")
    BigDecimal asBigDecimal;
}

例: Job XML ファイル

<batchlet ref="myBatchlet">
    <properties>
        <property name="weekDays" value="1,2,3,4,5,6,7"/>
    </properties>
</batchlet>

例: アーティファクトクラス

@Named
public class MyBatchlet extends AbstractBatchlet {
    @Inject
    @BatchProperty
    int[] weekDays;  // Array name is the same as batch property name.

    @Inject
    @BatchProperty (name = "weekDays")  // Use the name attribute to locate the batch property.
    Integer[] asIntegers;  // Inject it as a specific array type.

    @Inject
    @BatchProperty (name = "weekDays")
    String[] asStrings;

    @Inject
    @BatchProperty (name = "weekDays")
    byte[] asBytes;

    @Inject
    @BatchProperty (name = "weekDays")
    BigInteger[] asBigIntegers;

    @Inject
    @BatchProperty (name = "weekDays")
    BigDecimal[] asBigDecimals;

    @Inject
    @BatchProperty (name = "weekDays")
    List asList;

    @Inject
    @BatchProperty (name = "weekDays")
    List<String> asListString;

    @Inject
    @BatchProperty (name = "weekDays")
    Set asSet;

    @Inject
    @BatchProperty (name = "weekDays")
    Set<String> asSetString;
}

例: Job XML ファイル

<batchlet ref="myBatchlet">
    <properties>
        <property name="myClass" value="org.jberet.support.io.Person"/>
    </properties>
</batchlet>

例: アーティファクトクラス

@Named
public class MyBatchlet extends AbstractBatchlet {
    @Inject
    @BatchProperty
    private Class myClass;
}

例: アーティファクトクラス

/**
 Comment character. If commentChar batch property is not specified in job XML file, use the default value '#'.
 */
@Inject
@BatchProperty
private char commentChar = '#';