[HADOOP-17101] Replace Guava Function with Java8+ Function

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.2.2, 3.3.1, 3.4.0, 3.1.5
• Assignee: Ahmed Hussein
• Reporter: Ahmed Hussein
• Created: 30/Jun/20 04:43
• Updated: 21/Oct/20 07:34
• Resolved: 15/Jul/20 16:06

Description

Targets
    Occurrences of 'com.google.common.base.Function'
Found Occurrences  (7 usages found)
    hadoop-hdfs-project/hadoop-hdfs/dev-support/jdiff  (1 usage found)
        Apache_Hadoop_HDFS_2.6.0.xml  (1 usage found)
            13603 <field name="GET_START_TXID" type="com.google.common.base.Function"
    org.apache.hadoop.hdfs.server.blockmanagement  (1 usage found)
        HostSet.java  (1 usage found)
            20 import com.google.common.base.Function;
    org.apache.hadoop.hdfs.server.datanode.checker  (1 usage found)
        AbstractFuture.java  (1 usage found)
            58 * (ListenableFuture, com.google.common.base.Function) Futures.transform}
    org.apache.hadoop.hdfs.server.namenode.ha  (1 usage found)
        HATestUtil.java  (1 usage found)
            40 import com.google.common.base.Function;
    org.apache.hadoop.hdfs.server.protocol  (1 usage found)
        RemoteEditLog.java  (1 usage found)
            20 import com.google.common.base.Function;
    org.apache.hadoop.mapreduce.lib.input  (1 usage found)
        TestFileInputFormat.java  (1 usage found)
            58 import com.google.common.base.Function;
    org.apache.hadoop.yarn.api.protocolrecords.impl.pb  (1 usage found)
        GetApplicationsRequestPBImpl.java  (1 usage found)
            38 import com.google.common.base.Function;

Issue Links

• is related to: HADOOP-17319 Update the checkstyle config to ban some guava functions