/**
     * The flag to use ECS format.
     */
    protected boolean useEcsFormat = false;

    /**
     * The ECS version.
     */
    protected String ecsVersion = "1.2.0";

    /**
     * The ECS service name.
     */
    protected String ecsServiceName = "fess";

    /**
     * The ECS event dataset.
     */
    protected String ecsEventDataset = "app";

			<artifactId>log4j-jul</artifactId>
			<version>${log4j.version}</version>
		</dependency>
		<dependency>
			<groupId>co.elastic.logging</groupId>
			<artifactId>log4j2-ecs-layout</artifactId>
			<version>${log4j.ecs.version}</version>
		</dependency>

		<!-- opensearch -->
		<dependency>
			<groupId>org.opensearch</groupId>
			<artifactId>opensearch</artifactId>