Repository: apache/kafka
File: server-common/src/main/java/org/apache/kafka/server/share/persister/DefaultStatePersister.java (Java)

Code before:
import org.apache.kafka.common.requests.DeleteShareGroupStateResponse;
import org.apache.kafka.common.requests.InitializeShareGroupStateResponse;
import org.apache.kafka.common.requests.ReadShareGroupStateResponse;
import org.apache.kafka.common.requests.ReadShareGroupStateSummaryResponse;
import org.apache.kafka.common.requests.WriteShareGroupStateResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;

/**
 * The default implementation of the {@link Persister} interface which is used by the
 * group coordinator and share-partition leaders to manage the durable share-partition state.
 * This implementation uses inter-broker RPCs to make requests to the share coordinator
 * which is responsible for persisting the share-partition state.
 */
public class DefaultStatePersister implements Persister {
    private final PersisterStateManager stateManager;

    private static final Logger log = LoggerFactory.getLogger(DefaultStatePersister.class);
    private static final Logger INITIALIZE_HANDLER_LOG = LoggerFactory.getLogger(
        PersisterStateManager.InitializeStateHandler.class
    );
    private static final Logger WRITE_HANDLER_LOG = LoggerFactory.getLogger(
        PersisterStateManager.WriteStateHandler.class
    );
    private static final Logger READ_HANDLER_LOG = LoggerFactory.getLogger(
        PersisterStateManager.ReadStateHandler.class
    );
    private static final Logger READ_SUMMARY_HANDLER_LOG = LoggerFactory.getLogger(
        PersisterStateManager.ReadStateSummaryHandler.class
    );
    private static final Logger DELETE_HANDLER_LOG = LoggerFactory.getLogger(
        PersisterStateManager.DeleteStateHandler.class
    );

    public DefaultStatePersister(PersisterStateManager stateManager) {
        this.stateManager = stateManager;
        this.stateManager.start();
    }

    @Override
    public void stop() {
        try {
            if (stateManager != null) {
                stateManager.stop();

Review comment (refactor):
Another option is to introduce an abstract `logger` method within `PersisterStateManagerHandler`. This ensures that each subclass provides its owe dedicated logger, enabling us to initialize the logger within each class rather than grouping them in a single place 

Code after:
import org.apache.kafka.common.requests.DeleteShareGroupStateResponse;
import org.apache.kafka.common.requests.InitializeShareGroupStateResponse;
import org.apache.kafka.common.requests.ReadShareGroupStateResponse;
import org.apache.kafka.common.requests.ReadShareGroupStateSummaryResponse;
import org.apache.kafka.common.requests.WriteShareGroupStateResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;

/**
 * The default implementation of the {@link Persister} interface which is used by the
 * group coordinator and share-partition leaders to manage the durable share-partition state.
 * This implementation uses inter-broker RPCs to make requests to the share coordinator
 * which is responsible for persisting the share-partition state.
 */
public class DefaultStatePersister implements Persister {
    private final PersisterStateManager stateManager;

    private static final Logger log = LoggerFactory.getLogger(DefaultStatePersister.class);

    public DefaultStatePersister(PersisterStateManager stateManager) {
        this.stateManager = stateManager;
        this.stateManager.start();
    }

    @Override
    public void stop() {
        try {
            if (stateManager != null) {
                stateManager.stop();
            }
        } catch (Exception e) {
            log.error("Unable to stop state manager", e);
        }
    }

    /**
     * Used by the group coordinator to initialize the share-partition state.
     * This is an inter-broker RPC authorized as a cluster action.
     *
     * @param request InitializeShareGroupStateParameters
     * @return A completable future of InitializeShareGroupStateResult
     */
    public CompletableFuture<InitializeShareGroupStateResult> initializeState(InitializeShareGroupStateParameters request) {
        try {