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// distributed with this work for additional information
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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package querycoordv2

import (
	"context"

	"github.com/cockroachdb/errors"

	"github.com/milvus-io/milvus/internal/querycoordv2/job"
	"github.com/milvus-io/milvus/internal/querycoordv2/meta"
	"github.com/milvus-io/milvus/pkg/v3/mlog"
	"github.com/milvus-io/milvus/pkg/v3/streaming/util/message"
	"github.com/milvus-io/milvus/pkg/v3/util/merr"
)

// alterLoadConfigV2AckCallback is called when the put load config message is acknowledged
func (s *Server) alterLoadConfigV2AckCallback(ctx context.Context, result message.BroadcastResultAlterLoadConfigMessageV2) error {
	// currently, we only sent the put load config message to the control channel
	// TODO: after we support query view in 3.0, we should broadcast the put load config message to all vchannels.
	job := job.NewLoadCollectionJob(ctx, result, s.dist, s.meta, s.broker, s.targetMgr, s.targetObserver, s.collectionObserver, s.checkerController, s.nodeMgr, s.proxyClientManager)
	if err := job.Execute(); err != nil {
		// The collection's channel is already in dropped-sentinel state, meaning
		// a concurrent DropCollection has landed at the channel level on this
		// cluster (typically on a CDC replica). The load can never succeed; ack
		// the broadcast so the broadcaster stops retrying forever and the
		// pending rootcoord meta cleanup can complete. Mirrors the
		// ErrCollectionNotFound early-return inside LoadCollectionJob.Execute().
		if errors.Is(err, merr.ErrChannelDroppedSentinel) {
			mlog.Warn(ctx, "ack alter load config: collection channel is dropped sentinel",
				mlog.FieldCollectionID(result.Message.Header().GetCollectionId()),
				mlog.Err(err))
			return nil
		}
		return err
	}
	meta.GlobalFailedLoadCache.Remove(result.Message.Header().GetCollectionId())
	return nil
}
