[Zen2] Remove AbstractComponent usage

AbstractComponent was deprecated in elastic#35140 and is looking like it will be
removed at some point by elastic#34888. Today all it does is provide a logger. This
change removes the usages of AbstractComponent that live solely in the zen2
feature branch to avoid some future merge pain, and replaces it where necessary
with some directly-created loggers.

server/src/main/java/org/elasticsearch/cluster/coordination/CoordinationState.java

@@ -18,10 +18,11 @@
  */
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.ClusterState.VotingConfiguration;
 import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.settings.Settings;
 
 import java.util.Collection;
@@ -34,7 +35,9 @@
  * The core class of the cluster state coordination algorithm, directly implementing the
  * <a href="https://github.com/elastic/elasticsearch-formal-models/blob/master/ZenWithTerms/tla/ZenWithTerms.tla">formal model</a>
  */
-public class CoordinationState extends AbstractComponent {
+public class CoordinationState {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     private final DiscoveryNode localNode;
 

server/src/main/java/org/elasticsearch/cluster/coordination/ElectionSchedulerFactory.java

@@ -19,9 +19,10 @@
 
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.common.SuppressForbidden;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.lease.Releasable;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Setting.Property;
@@ -43,7 +44,9 @@
  * so that if elections are failing due to a network partition that lasts for a long time then when the partition heals there is an election
  * attempt reasonably quickly.
  */
-public class ElectionSchedulerFactory extends AbstractComponent {
+public class ElectionSchedulerFactory {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     private static final String ELECTION_INITIAL_TIMEOUT_SETTING_KEY = "cluster.election.initial_timeout";
     private static final String ELECTION_BACK_OFF_TIME_SETTING_KEY = "cluster.election.back_off_time";

server/src/main/java/org/elasticsearch/cluster/coordination/FollowersChecker.java

@@ -19,13 +19,14 @@
 
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.cluster.ClusterName;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.coordination.Coordinator.Mode;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.settings.Setting;
@@ -62,7 +63,9 @@
  * considering a follower to be faulty, to allow for a brief network partition or a long GC cycle to occur without triggering the removal of
  * a node and the consequent shard reallocation.
  */
-public class FollowersChecker extends AbstractComponent {
+public class FollowersChecker {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     public static final String FOLLOWER_CHECK_ACTION_NAME = "internal:coordination/fault_detection/follower_check";
 

server/src/main/java/org/elasticsearch/cluster/coordination/JoinHelper.java

@@ -18,6 +18,8 @@
  */
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.ClusterStateTaskConfig;
@@ -28,7 +30,6 @@
 import org.elasticsearch.cluster.service.MasterService;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.collect.Tuple;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
@@ -57,7 +58,9 @@
 import java.util.function.Function;
 import java.util.function.LongSupplier;
 
-public class JoinHelper extends AbstractComponent {
+public class JoinHelper {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     public static final String JOIN_ACTION_NAME = "internal:cluster/coordination/join";
     public static final String START_JOIN_ACTION_NAME = "internal:cluster/coordination/start_join";

server/src/main/java/org/elasticsearch/cluster/coordination/LeaderChecker.java

@@ -19,12 +19,13 @@
 
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.cluster.ClusterName;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
 import org.elasticsearch.common.Nullable;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.lease.Releasable;
@@ -56,7 +57,9 @@
  * temporarily stand down on occasion, e.g. if it needs to move to a higher term. On deciding that the leader has failed a follower will
  * become a candidate and attempt to become a leader itself.
  */
-public class LeaderChecker extends AbstractComponent {
+public class LeaderChecker {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     public static final String LEADER_CHECK_ACTION_NAME = "internal:coordination/fault_detection/leader_check";
 
@@ -149,7 +152,7 @@ public void updateLeader(@Nullable final DiscoveryNode leader) {
      * Update the "known" discovery nodes. Should be called on the leader before a new cluster state is published to reflect the new
      * publication targets, and also called if a leader becomes a non-leader.
      * TODO if heartbeats can make nodes become followers then this needs to be called before a heartbeat is sent to a new node too.
-     *
+     * <p>
      * isLocalNodeElectedMaster() should reflect whether this node is a leader, and nodeExists()
      * should indicate whether nodes are known publication targets or not.
      */

server/src/main/java/org/elasticsearch/cluster/coordination/PreVoteCollector.java

@@ -19,13 +19,14 @@
 
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.coordination.CoordinationState.VoteCollection;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.collect.Tuple;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.lease.Releasable;
 import org.elasticsearch.threadpool.ThreadPool.Names;
@@ -41,7 +42,9 @@
 import static org.elasticsearch.cluster.coordination.CoordinationState.isElectionQuorum;
 import static org.elasticsearch.common.util.concurrent.ConcurrentCollections.newConcurrentSet;
 
-public class PreVoteCollector extends AbstractComponent {
+public class PreVoteCollector {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     public static final String REQUEST_PRE_VOTE_ACTION_NAME = "internal:cluster/request_pre_vote";
 

server/src/main/java/org/elasticsearch/cluster/coordination/Publication.java

@@ -19,13 +19,14 @@
 
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.coordination.ClusterStatePublisher.AckListener;
 import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.transport.TransportException;
 import org.elasticsearch.transport.TransportResponse;
@@ -36,7 +37,9 @@
 import java.util.Set;
 import java.util.function.LongSupplier;
 
-public abstract class Publication extends AbstractComponent {
+public abstract class Publication {
+
+    protected final Logger logger = LogManager.getLogger(getClass());
 
     private final List<PublicationTarget> publicationTargets;
     private final PublishRequest publishRequest;

server/src/main/java/org/elasticsearch/cluster/coordination/PublicationTransportHandler.java

@@ -18,6 +18,8 @@
  */
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.Version;
@@ -29,7 +31,6 @@
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
 import org.elasticsearch.common.bytes.BytesReference;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.compress.Compressor;
 import org.elasticsearch.common.compress.CompressorFactory;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
@@ -61,7 +62,9 @@
 import java.util.function.Consumer;
 import java.util.function.Function;
 
-public class PublicationTransportHandler extends AbstractComponent {
+public class PublicationTransportHandler {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     public static final String PUBLISH_STATE_ACTION_NAME = "internal:cluster/coordination/publish_state";
     public static final String COMMIT_STATE_ACTION_NAME = "internal:cluster/coordination/commit_state";

server/src/main/java/org/elasticsearch/cluster/coordination/Reconfigurator.java

@@ -19,9 +19,10 @@
 
 package org.elasticsearch.cluster.coordination;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.settings.ClusterSettings;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Setting.Property;
@@ -37,7 +38,9 @@
 /**
  * Computes the optimal configuration of voting nodes in the cluster.
  */
-public class Reconfigurator extends AbstractComponent {
+public class Reconfigurator {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     /**
      * The cluster usually requires a vote from at least half of the master nodes in order to commit a cluster state update, and to achieve

server/src/main/java/org/elasticsearch/discovery/HandshakingTransportAddressConnector.java

@@ -19,12 +19,13 @@
 
 package org.elasticsearch.discovery;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.Randomness;
 import org.elasticsearch.common.UUIDs;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.transport.TransportAddress;
@@ -41,7 +42,9 @@
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.emptySet;
 
-public class HandshakingTransportAddressConnector extends AbstractComponent implements TransportAddressConnector {
+public class HandshakingTransportAddressConnector implements TransportAddressConnector {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     // connection timeout for probes
     public static final Setting<TimeValue> PROBE_CONNECT_TIMEOUT_SETTING =

server/src/main/java/org/elasticsearch/discovery/PeerFinder.java

@@ -20,6 +20,8 @@
 package org.elasticsearch.discovery;
 
 import com.carrotsearch.hppc.cursors.ObjectCursor;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.action.ActionListener;
@@ -30,7 +32,6 @@
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
 import org.elasticsearch.common.Nullable;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
@@ -63,7 +64,9 @@
 
 import static org.elasticsearch.common.util.concurrent.ConcurrentCollections.newConcurrentMap;
 
-public abstract class PeerFinder extends AbstractComponent {
+public abstract class PeerFinder {
+
+    protected final Logger logger = LogManager.getLogger(getClass());
 
     public static final String REQUEST_PEERS_ACTION_NAME = "internal:discovery/request_peers";
 

server/src/test/java/org/elasticsearch/cluster/coordination/CoordinatorTests.java

@@ -19,6 +19,8 @@
 package org.elasticsearch.cluster.coordination;
 
 import org.apache.logging.log4j.CloseableThreadContext;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.cluster.ClusterName;
@@ -34,7 +36,6 @@
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.service.ClusterApplier;
 import org.elasticsearch.common.Randomness;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.lease.Releasable;
 import org.elasticsearch.common.settings.ClusterSettings;
 import org.elasticsearch.common.settings.Setting;
@@ -1295,7 +1296,8 @@ public void setLastAcceptedState(ClusterState clusterState) {
             }
         }
 
-        class ClusterNode extends AbstractComponent {
+        class ClusterNode {
+            private final Logger logger = LogManager.getLogger(getClass());
             private final int nodeIndex;
             private Coordinator coordinator;
             private DiscoveryNode localNode;

test/framework/src/main/java/org/elasticsearch/cluster/coordination/DeterministicTaskQueue.java

@@ -20,8 +20,9 @@
 package org.elasticsearch.cluster.coordination;
 
 import com.carrotsearch.randomizedtesting.generators.RandomNumbers;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.lucene.util.Counter;
-import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.threadpool.ThreadPool;
@@ -42,7 +43,9 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Function;
 
-public class DeterministicTaskQueue extends AbstractComponent {
+public class DeterministicTaskQueue {
+
+    private final Logger logger = LogManager.getLogger(getClass());
 
     private final Settings settings;
     private final List<Runnable> runnableTasks = new ArrayList<>();