skaundinya15 commented on a change in pull request #10743:
URL: https://github.com/apache/kafka/pull/10743#discussion_r655134390
##########
File path:
clients/src/main/java/org/apache/kafka/clients/admin/internals/CoordinatorStrategy.java
##########
@@ -17,84 +17,153 @@
package org.apache.kafka.clients.admin.internals;
import org.apache.kafka.common.errors.GroupAuthorizationException;
+import org.apache.kafka.common.errors.InvalidGroupIdException;
import org.apache.kafka.common.errors.TransactionalIdAuthorizationException;
import org.apache.kafka.common.message.FindCoordinatorRequestData;
+import org.apache.kafka.common.message.FindCoordinatorResponseData.Coordinator;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.requests.AbstractResponse;
import org.apache.kafka.common.requests.FindCoordinatorRequest;
+import org.apache.kafka.common.requests.FindCoordinatorRequest.CoordinatorType;
import org.apache.kafka.common.requests.FindCoordinatorResponse;
import org.apache.kafka.common.utils.LogContext;
import org.slf4j.Logger;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
import java.util.Objects;
import java.util.Set;
+import java.util.stream.Collectors;
public class CoordinatorStrategy implements
AdminApiLookupStrategy<CoordinatorKey> {
+
+ private static final ApiRequestScope GROUP_REQUEST_SCOPE = new
ApiRequestScope() { };
+ private static final ApiRequestScope TXN_REQUEST_SCOPE = new
ApiRequestScope() { };
+
private final Logger log;
+ private final FindCoordinatorRequest.CoordinatorType type;
+ private boolean batch = true;
+ private Set<CoordinatorKey> unrepresentableKeys = Collections.emptySet();
public CoordinatorStrategy(
+ FindCoordinatorRequest.CoordinatorType type,
LogContext logContext
) {
+ this.type = type;
this.log = logContext.logger(CoordinatorStrategy.class);
}
@Override
public ApiRequestScope lookupScope(CoordinatorKey key) {
- // The `FindCoordinator` API does not support batched lookups, so we
use a
- // separate lookup context for each coordinator key we need to lookup
- return new LookupRequestScope(key);
+ if (batch) {
+ if (type == CoordinatorType.GROUP) {
+ return GROUP_REQUEST_SCOPE;
+ } else {
+ return TXN_REQUEST_SCOPE;
+ }
+ } else {
+ // If the `FindCoordinator` API does not support batched lookups,
we use a
+ // separate lookup context for each coordinator key we need to
lookup
+ return new LookupRequestScope(key);
+ }
}
@Override
public FindCoordinatorRequest.Builder buildRequest(Set<CoordinatorKey>
keys) {
- CoordinatorKey key = requireSingleton(keys);
- return new FindCoordinatorRequest.Builder(
- new FindCoordinatorRequestData()
- .setKey(key.idValue)
- .setKeyType(key.type.id())
- );
+ unrepresentableKeys = keys.stream().filter(k ->
!isRepresentableKey(k.idValue)).collect(Collectors.toSet());
+ keys = keys.stream().filter(k ->
isRepresentableKey(k.idValue)).collect(Collectors.toSet());
+ if (batch) {
+ keys = requireSameType(keys);
+ FindCoordinatorRequestData data = new FindCoordinatorRequestData()
+ .setKeyType(type.id())
+ .setCoordinatorKeys(keys.stream().map(k ->
k.idValue).collect(Collectors.toList()));
+ return new FindCoordinatorRequest.Builder(data);
+ } else {
+ CoordinatorKey key = requireSingleton(keys);
+ return new FindCoordinatorRequest.Builder(
+ new FindCoordinatorRequestData()
+ .setKey(key.idValue)
+ .setKeyType(key.type.id())
+ );
+ }
}
@Override
public LookupResult<CoordinatorKey> handleResponse(
Set<CoordinatorKey> keys,
AbstractResponse abstractResponse
) {
- CoordinatorKey key = requireSingleton(keys);
+ Map<CoordinatorKey, Integer> mappedKeys = new HashMap<>();
+ Map<CoordinatorKey, Throwable> failedKeys = new HashMap<>();
+
+ for (CoordinatorKey key : unrepresentableKeys) {
+ failedKeys.put(key, new InvalidGroupIdException("The given group
id '" +
+ key.idValue + "' cannot be represented in a
request."));
+ }
FindCoordinatorResponse response = (FindCoordinatorResponse)
abstractResponse;
- Errors error = response.error();
+ if (batch) {
+ for (Coordinator coordinator : response.data().coordinators()) {
+ handleError(Errors.forCode(coordinator.errorCode()),
+ new CoordinatorKey(type, coordinator.key()),
+ coordinator.nodeId(),
+ mappedKeys,
+ failedKeys);
+ }
+ } else {
+ CoordinatorKey key = requireSingleton(keys);
+ Errors error = response.error();
+ handleError(error, key, response.node().id(), mappedKeys,
failedKeys);
+ }
+ return new LookupResult<>(failedKeys, mappedKeys);
+ }
+
+ public void disableBatch() {
+ batch = false;
+ }
+
+ private static CoordinatorKey requireSingleton(Set<CoordinatorKey> keys) {
+ if (keys.size() != 1) {
+ throw new IllegalArgumentException("Unexpected lookup key set");
+ }
+ return keys.iterator().next();
+ }
+ private static Set<CoordinatorKey> requireSameType(Set<CoordinatorKey>
keys) {
+ if (keys.stream().map(k -> k.type).collect(Collectors.toSet()).size()
!= 1) {
+ throw new IllegalArgumentException("Unexpected lookup key set");
+ }
+ return keys;
+ }
+
+ private static boolean isRepresentableKey(String groupId) {
+ return groupId != null;
+ }
+
+ private void handleError(Errors error, CoordinatorKey key, int nodeId,
Map<CoordinatorKey, Integer> mappedKeys, Map<CoordinatorKey, Throwable>
failedKeys) {
switch (error) {
case NONE:
- return LookupResult.mapped(key, response.data().nodeId());
-
+ mappedKeys.put(key, nodeId);
+ break;
case COORDINATOR_NOT_AVAILABLE:
Review comment:
@mimaison Gotcha, makes sense. Perhaps we can still log at `DEBUG` level
so in case we need to debug, we have evidence of this in the logs.
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