Java cassandra 3.x触发器示例错误
嘿,我想实现这个例子 但它不起作用,我不知道如何修复它Java cassandra 3.x触发器示例错误,java,xml,triggers,cassandra,Java,Xml,Triggers,Cassandra,嘿,我想实现这个例子 但它不起作用,我不知道如何修复它 public class AuditTrigger implements ITrigger { private Properties properties = loadProperties(); public Collection<Mutation> augment(Partition update) { String auditKeyspace = properties.getProp
public class AuditTrigger implements ITrigger
{
private Properties properties = loadProperties();
public Collection<Mutation> augment(Partition update)
{
String auditKeyspace = properties.getProperty("keyspace");
String auditTable = properties.getProperty("table");
RowUpdateBuilder audit = new RowUpdateBuilder(Schema.instance.getCFMetaData(auditKeyspace, auditTable),
FBUtilities.timestampMicros(),
UUIDGen.getTimeUUID());
audit.add("keyspace_name", update.metadata().ksName);
audit.add("table_name", update.metadata().cfName);
audit.add("primary_key", update.metadata().getKeyValidator().getString(update.partitionKey().getKey()));
return Collections.singletonList(audit.build());
}
private static Properties loadProperties()
{
Properties properties = new Properties();
InputStream stream = AuditTrigger.class.getClassLoader().getResourceAsStream("AuditTrigger.properties");
try
{
properties.load(stream);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
finally
{
// FileUtils.closeQuietly(stream);
}
return properties;
}
}
公共类AuditTrigger实现ITrigger
{
私有属性=loadProperties();
公共集合扩充(分区更新)
{
字符串auditKeyspace=properties.getProperty(“keyspace”);
String auditTable=properties.getProperty(“表”);
RowUpdateBuilder audit=新的RowUpdateBuilder(Schema.instance.getCFMetaData(auditKeyspace,auditTable),
FBUtilities.timestampMicros(),
getTimeUUID());
add(“keyspace_name”,update.metadata().ksName);
audit.add(“table_name”,update.metadata().cfName);
audit.add(“主键”,update.metadata().getKeyValidator().getString(update.partitionKey().getKey());
返回Collections.singletonList(audit.build());
}
私有静态属性loadProperties()
{
属性=新属性();
InputStream stream=AuditTrigger.class.getClassLoader().getResourceAsStream(“AuditTrigger.properties”);
尝试
{
属性。加载(流);
}
捕获(例外e)
{
抛出新的运行时异常(e);
}
最后
{
//安静地关闭(流);
}
归还财产;
}
}
和xml代码:
<project default="jar" name="trigger-example">
<property name="cassandra.dir" value="../.." />
<property name="cassandra.dir.lib" value="${cassandra.dir}/lib" />
<property name="cassandra.classes" value="${cassandra.dir}/build/classes/main" />
<property name="build.src" value="${basedir}/src" />
<property name="build.dir" value="${basedir}/build" />
<property name="conf.dir" value="${basedir}/conf" />
<property name="build.classes" value="${build.dir}/classes" />
<property name="final.name" value="trigger-example" />
<path id="build.classpath">
<fileset dir="${cassandra.dir.lib}">
<include name="**/*.jar" />
</fileset>
<fileset dir="${cassandra.dir}/build/lib/jars">
<include name="**/*.jar" />
</fileset>
<pathelement location="${cassandra.classes}" />
</path>
<target name="init">
<mkdir dir="${build.classes}" />
</target>
<target name="build" depends="init">
<javac destdir="${build.classes}" debug="true" includeantruntime="false">
<src path="${build.src}" />
<classpath refid="build.classpath" />
</javac>
</target>
<target name="jar" depends="build">
<jar jarfile="${build.dir}/${final.name}.jar">
<fileset dir="${build.classes}" />
<fileset dir="${conf.dir}">
<include name="**/*.properties" />
</fileset>
</jar>
</target>
<target name="clean">
<delete dir="${build.dir}" />
</target>
<dependencies>
<dependency>
<groupId>org.apache.cassandra</groupId>
<artifactId>cassandra-all</artifactId>
<version>0.8.0-rc1</version>
</dependency>
</dependencies>
</project>
org.apache.cassandra
卡桑德拉
0.8.0-rc1
我得到一个错误:
实例无法解析或不是字段
当我想创建一个新的RowUpdateBuilder对象时。
有人能帮忙吗?Cassandra trigger的类加载器不同。所以您应该将方法
loadProperties
提取到另一个类中,并打包到$CASSANDRA/libCASSANDRA触发器的类加载器是不同的。所以您应该将方法loadProperties
提取到另一个类中,并打包到pom中的$CASSANDRA/lib
中
<dependencies>
<dependency>
<groupId>org.apache.cassandra</groupId>
<artifactId>cassandra-all</artifactId>
<version>3.6</version>
</dependency>
</dependencies>
org.apache.cassandra
卡桑德拉
3.6
代码必须是这样的,它对我有用
import java.util.*;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.db.RowUpdateBuilder;
import org.apache.cassandra.db.partitions.Partition;
import org.apache.cassandra.triggers.ITrigger;
import org.apache.cassandra.utils.FBUtilities;
import static org.apache.cassandra.cql3.CQL3Type.logger;
public class CassandraTrigger implements ITrigger{
public Collection<Mutation> augment(Partition update) {
//Hard code properties, You can do that however you want
String auditKeyspace = "test_networktopology";
String auditTable = "timestamptest";
RowUpdateBuilder audit = new RowUpdateBuilder(Schema.instance.getCFMetaData(auditKeyspace, auditTable),
FBUtilities.timestampMicros(),
update.partitionKey());
Calendar calendar = Calendar.getInstance();
audit.add("time", calendar.getTime());
return Collections.singletonList(audit.build());
}
}
import java.util.*;
导入org.apache.cassandra.config.Schema;
导入org.apache.cassandra.db.org;
导入org.apache.cassandra.db.RowUpdateBuilder;
导入org.apache.cassandra.db.partitions.Partition;
导入org.apache.cassandra.triggers.ITrigger;
导入org.apache.cassandra.utils.FBUtilities;
导入静态org.apache.cassandra.cql3.CQL3Type.logger;
公共类CassandraTrigger实现了ITrigger{
公共集合扩充(分区更新){
//硬代码属性,您可以按自己的意愿执行
String auditKeyspace=“test\u networktopology”;
String auditTable=“timestamptest”;
RowUpdateBuilder audit=新的RowUpdateBuilder(Schema.instance.getCFMetaData(auditKeyspace,auditTable),
FBUtilities.timestampMicros(),
update.partitionKey());
日历=Calendar.getInstance();
add(“time”,calendar.getTime());
返回Collections.singletonList(audit.build());
}
}
pom中的
<dependencies>
<dependency>
<groupId>org.apache.cassandra</groupId>
<artifactId>cassandra-all</artifactId>
<version>3.6</version>
</dependency>
</dependencies>
org.apache.cassandra
卡桑德拉
3.6
代码必须是这样的,它对我有用
import java.util.*;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.db.RowUpdateBuilder;
import org.apache.cassandra.db.partitions.Partition;
import org.apache.cassandra.triggers.ITrigger;
import org.apache.cassandra.utils.FBUtilities;
import static org.apache.cassandra.cql3.CQL3Type.logger;
public class CassandraTrigger implements ITrigger{
public Collection<Mutation> augment(Partition update) {
//Hard code properties, You can do that however you want
String auditKeyspace = "test_networktopology";
String auditTable = "timestamptest";
RowUpdateBuilder audit = new RowUpdateBuilder(Schema.instance.getCFMetaData(auditKeyspace, auditTable),
FBUtilities.timestampMicros(),
update.partitionKey());
Calendar calendar = Calendar.getInstance();
audit.add("time", calendar.getTime());
return Collections.singletonList(audit.build());
}
}
import java.util.*;
导入org.apache.cassandra.config.Schema;
导入org.apache.cassandra.db.org;
导入org.apache.cassandra.db.RowUpdateBuilder;
导入org.apache.cassandra.db.partitions.Partition;
导入org.apache.cassandra.triggers.ITrigger;
导入org.apache.cassandra.utils.FBUtilities;
导入静态org.apache.cassandra.cql3.CQL3Type.logger;
公共类CassandraTrigger实现了ITrigger{
公共集合扩充(分区更新){
//硬代码属性,您可以按自己的意愿执行
String auditKeyspace=“test\u networktopology”;
String auditTable=“timestamptest”;
RowUpdateBuilder audit=新的RowUpdateBuilder(Schema.instance.getCFMetaData(auditKeyspace,auditTable),
FBUtilities.timestampMicros(),
update.partitionKey());
日历=Calendar.getInstance();
add(“time”,calendar.getTime());
返回Collections.singletonList(audit.build());
}
}
您是在编译时还是在运行触发器时收到此错误?请包含适当的生成或运行日志。您是在编译时还是在运行触发器时收到此错误?请提供相应的生成或运行日志。您好,优素福,我们使用的是cassandra all 3.11.2版,它没有RowUpdateBuilder?您好,优素福,我们使用的是cassandra所有版本3.11.2,它没有RowUpdateBuilder?你能帮我一下吗。