Flume Appender

Flume Appender 允许应用程序将事件发送到 Flume Agents。

Remote Agent

在基于 Maven 的项目中包括 Log4j flume-ng jar 作为依赖项，应导致包括使远程代理起作用所需的所有传递性依赖项。

Persistent Agent

持久代理使用 Berkeley DB。除了 log4j-flume-ng 依赖项之外，还应将以下依赖项添加到 pom.xml 中。

<dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>com.sleepycat</groupId>
        <artifactId>je</artifactId>
        <version>5.0.73</version>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.sleepycat</groupId>
      <artifactId>je</artifactId>
    </dependency>
  </dependencies>
  <repositories>
    <repository>
      <id>oracleReleases</id>
      <name>Oracle Released Java Packages</name>
      <url>http://download.oracle.com/maven</url>
      <layout>default</layout>
    </repository>
  </repositories>

Embedded Agent

以下是 Maven 的 pom 文件示例，可以用作将 Flume Embedded Appender 集成到应用程序中的模板。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.myapp</groupId>
  <artifactId>myapp</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>My App</name>
  <description>App to test log4j appender</description>

  <properties>
    <log4j.version>2.13.3</log4j.version>
    <slf4j.version>1.7.25</slf4j.version>
    <jackson.version>1.9.13</jackson.version>
  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${slf4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-ext</artifactId>
        <version>${slf4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-1.2-api</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-flume-ng</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-slf4j-impl</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-jcl</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-core-asl</artifactId>
        <version>${jackson.version}</version>
      </dependency>
      <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>${jackson.version}</version>
      </dependency>
      <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-jaxrs</artifactId>
        <version>${jackson.version}</version>
      </dependency>
      <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-xc</artifactId>
        <version>${jackson.version}</version>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>
    <!-- Log4j 2 API -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
    </dependency>
    <!-- Log4j 1.x API -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j12-api</artifactId>
    </dependency>
    <!-- Log4j 2 implementation -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
    </dependency>
    <!-- SLF4J to Log4j 2 binding -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>slf4j-impl</artifactId>
    </dependency>
    <!-- SLF4J API -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
    </dependency>
    <!-- SLF4J extensions -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-ext</artifactId>
    </dependency>
    <!-- Commson Logging to Log4j 2 binding -->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-jcl</artifactId>
    </dependency>
    <!-- Avro transport protocol - required for Flume -->
    <dependency>
      <groupId>org.apache.avro</groupId>
      <artifactId>avro</artifactId>
      <version>1.6.3</version>
    </dependency>
    <!-- Hadoop core - required by embedded Flume Agent -->
    <dependency>
      <groupId>org.apache.hadoop</groupId>
      <artifactId>hadoop-core</artifactId>
      <version>1.0.3</version>
      <exclusions>
        <exclusion>
          <groupId>org.mortbay.jetty</groupId>
          <artifactId>servlet-api</artifactId>
        </exclusion>
        <exclusion>
          <groupId>org.mortbay.jetty</groupId>
          <artifactId>servlet-api-2.5</artifactId>
        </exclusion>
        <exclusion>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <!-- Flume File Channel - required by embedded Flume agent -->
    <dependency>
      <groupId>org.apache.flume.flume-ng-channels</groupId>
      <artifactId>flume-file-channel</artifactId>
      <version>1.2.0</version>
      <exclusions>
        <exclusion>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
        </exclusion>
        <exclusion>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>
</project>

Requirements

Flume Appender 需要 Log4J 2 API。有关更多信息，请参见Runtime Dependencies。