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The official Couchbase JVM Core IO Library
/*
* Copyright (c) 2018 Couchbase, Inc.
*
* Licensed 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 com.couchbase.client.core.msg.kv;
import com.couchbase.client.core.CoreContext;
import com.couchbase.client.core.cnc.CbTracing;
import com.couchbase.client.core.cnc.RequestSpan;
import com.couchbase.client.core.cnc.TracingIdentifiers;
import com.couchbase.client.core.deps.io.netty.util.ReferenceCountUtil;
import com.couchbase.client.core.io.CollectionIdentifier;
import com.couchbase.client.core.io.netty.kv.KeyValueChannelContext;
import com.couchbase.client.core.io.netty.kv.MemcacheProtocol;
import com.couchbase.client.core.msg.ResponseStatus;
import com.couchbase.client.core.retry.RetryStrategy;
import com.couchbase.client.core.deps.io.netty.buffer.ByteBuf;
import com.couchbase.client.core.deps.io.netty.buffer.ByteBufAllocator;
import java.time.Duration;
import java.util.Optional;
import static com.couchbase.client.core.io.netty.kv.MemcacheProtocol.*;
/**
* Represents a KV delete operation.
*
* @since 2.0.0
*/
public class RemoveRequest extends BaseKeyValueRequest implements SyncDurabilityRequest {
private final long cas;
private final Optional syncReplicationType;
public RemoveRequest(final String key, final long cas, final Duration timeout,
final CoreContext ctx, CollectionIdentifier collectionIdentifier,
final RetryStrategy retryStrategy,
final Optional syncReplicationType, final RequestSpan span) {
super(timeout, ctx, retryStrategy, key, collectionIdentifier, span);
this.cas = cas;
this.syncReplicationType = syncReplicationType;
if (span != null && !CbTracing.isInternalSpan(span)) {
span.lowCardinalityAttribute(TracingIdentifiers.ATTR_OPERATION, TracingIdentifiers.SPAN_REQUEST_KV_REMOVE);
applyLevelOnSpan(syncReplicationType, span);
}
}
@Override
public ByteBuf encode(ByteBufAllocator alloc, int opaque, KeyValueChannelContext ctx) {
ByteBuf key = null;
ByteBuf flexibleExtras = mutationFlexibleExtras(this, ctx, alloc, syncReplicationType);
try {
key = encodedKeyWithCollection(alloc, ctx);
return MemcacheProtocol.flexibleRequest(alloc, MemcacheProtocol.Opcode.DELETE, noDatatype(),
partition(), opaque, cas, flexibleExtras, noExtras(), key, noBody());
} finally {
ReferenceCountUtil.release(key);
ReferenceCountUtil.release(flexibleExtras);
}
}
@Override
public RemoveResponse decode(final ByteBuf response, KeyValueChannelContext ctx) {
ResponseStatus status = decodeStatus(response);
Optional mutationToken = extractToken(
ctx.mutationTokensEnabled(),
partition(),
response,
ctx.bucket().get()
);
return new RemoveResponse(status, cas(response), mutationToken, flexibleExtras(response));
}
@Override
public Optional durabilityLevel() {
return syncReplicationType;
}
@Override
public String name() {
return "remove";
}
}