Question

我想更改Datastax驱动程序记录器的日志级别，但经过多次尝试后我无法弄清楚...

这是我使用的课程：

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.Metadata;

import com.datastax.driver.core.Session;
import com.datastax.driver.mapping.MappingManager;

public class CassandraSession {

/**
 * CassandraSession singleton
 */
private static CassandraSession INSTANCE = null;
/**
 * The Cassandra Cluster
 */
private static Cluster cluster;
/**
 * The Cassandra Session
 */
private static Session session;
/**
 * MappingManager is used to create Cassandra mappers
 */
private static MappingManager manager;
/**
 * LOGGER
 */
private static final Logger LOGGER = Logger.getLogger(CassandraSession.class);
/**
 * Keyspace Name
 */
private static final String KEYSPACE = "MY_KEYSPACE";

/**
 * CassandraSession
 */
private CassandraSession() {
    initialize();
}

/**
 * This method initializes the connection with the Cassandra Database
 */
private void initialize() {
    cluster = Cluster.builder().withClusterName("TestCluster").addContactPoints("127.0.0.1").withPort(9042).build();
    final Metadata metadata = cluster.getMetadata();
    LOGGER.info("Connected to cluster: " + metadata.getClusterName());
}

/**
 * Get the instance of the singleton CassandraSession
 *
 * @return
 */
public static synchronized CassandraSession getInstance() {
    if (INSTANCE == null) {
        INSTANCE = new CassandraSession();
    }
    return INSTANCE;
}

/**
 * Get the Cassandra Session
 *
 * @return
 */
public Session getSession() {
    if (session == null) {
        session = cluster.connect(KEYSPACE);
    }
    return session;
}

/**
 * Get the Cassandra MappingManager
 *
 * @return
 */
public MappingManager getManager() {
    if (manager == null) {
        manager = new MappingManager(session);
    }
    return manager;
}

}

我尝试将log4j.properties文件放在src / main / resources中，以编程方式更改日志级别，没有任何变化。我仍然得到以下痕迹：

11:39:48.762 [http-bio-8080-exec-6] DEBUG c.d.driver.core.SystemProperties - com.datastax.driver.NEW_NODE_DELAY_SECONDS is undefined, using default value 1
11:39:48.768 [http-bio-8080-exec-6] DEBUG c.d.driver.core.SystemProperties - com.datastax.driver.NON_BLOCKING_EXECUTOR_SIZE is undefined, using default value 8
11:39:48.770 [http-bio-8080-exec-6] DEBUG c.d.driver.core.SystemProperties - com.datastax.driver.NOTIF_LOCK_TIMEOUT_SECONDS is undefined, using default value 60
11:39:48.812 [http-bio-8080-exec-6] DEBUG com.datastax.driver.core.Cluster - Starting new cluster with contact points [/127.0.0.1:9042]
11:39:48.827 [http-bio-8080-exec-6] DEBUG i.n.u.i.l.InternalLoggerFactory - Using SLF4J as the default logging framework
11:39:48.924 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.Buffer.address: available
11:39:48.924 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available
11:39:48.924 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available
11:39:48.925 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: true
11:39:48.926 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent - Platform: Windows
11:39:48.926 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent - Java version: 8
11:39:48.926 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.noUnsafe: false
11:39:48.926 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent - sun.misc.Unsafe: available
11:39:48.927 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.noJavassist: false
11:39:48.929 [http-bio-8080-exec-6] DEBUG i.n.util.internal.PlatformDependent - Javassist: unavailable

我从这些痕迹中可以看出，sl4j被用作默认的日志记录框架。然后，我如何告诉Datastax的驱动程序使用我的记录器（其属性由我的服务器定义）。

使用的服务器：Apache TomEE Plume 1.7.2

Datastax驱动程序版本：2.1.9

Cassandra版本：2.2.1

感谢。

Answer 1

感谢您的回答Olivier，但是这个依赖已经在我的pom.xml中声明了（我在询问问题之前看到了您链接的页面）。

但是没关系，我找到了解决方案。实际上问题是关于slf4j绑定之间的冲突，我在TomEE的日志中看到了它。

我在我的pom.xml中有这个绑定：

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.7.12</version>
</dependency>

此库中的另一个绑定：

<dependency>
    <groupId>org.apache.cassandra</groupId>
    <artifactId>cassandra-all</artifactId>
    <version>2.2.1</version>
</dependency>

关于＆＃34; logback-classic.jar＆＃34;

然后解决方法是排除它：

<dependency>
    <groupId>org.apache.cassandra</groupId>
    <artifactId>cassandra-all</artifactId>
    <version>2.2.1</version>
        <exclusions>
            <exclusion>
                <artifactId>logback-classic</artifactId>
                <groupId>ch.qos.logback</groupId>
            </exclusion>
        </exclusions>
</dependency>

感谢。

Answer 2

SLF4J是一个外观，它将根据运行时类路径中存在的绑定选择一个日志框架。既然你提到了Log4j，你可能想要这样的东西：

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.7.12</version>
</dependency>

有关登录驱动程序的详细信息，请参阅this page。

Answer 3

我只是使用基于Datastax的Getting Started with Apache Cassandra and Java (Part I)的简单命令行应用来实现此目的。经过大量的搜索和实验，我发现我的解决方案是创建一个几乎为空的logback.xml文件，其中包含以下内容：

<configuration />

Datastax驱动程序日志级别

3 个答案: