Vladsz83 commented on code in PR #13577: URL: https://github.com/apache/ignite/pull/13577#discussion_r4155519669
########## modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/snapshot/SnapshotDeleteProcess.java: ########## @@ -0,0 +1,415 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file 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 org.apache.ignite.internal.processors.cache.persistence.snapshot; + +import java.io.File; +import java.io.IOException; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.UUID; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicInteger; +import java.util.concurrent.atomic.AtomicReference; +import org.apache.ignite.IgniteIllegalStateException; +import org.apache.ignite.IgniteLogger; +import org.apache.ignite.cluster.ClusterNode; +import org.apache.ignite.internal.GridKernalContext; +import org.apache.ignite.internal.IgniteInternalFuture; +import org.apache.ignite.internal.NodeStoppingException; +import org.apache.ignite.internal.processors.cache.persistence.filename.SnapshotFileTree; +import org.apache.ignite.internal.util.distributed.DistributedProcess; +import org.apache.ignite.internal.util.future.GridFinishedFuture; +import org.apache.ignite.internal.util.future.GridFutureAdapter; +import org.apache.ignite.internal.util.typedef.F; +import org.apache.ignite.internal.util.typedef.T2; +import org.apache.ignite.internal.util.typedef.internal.U; +import org.apache.ignite.lang.IgniteReducer; +import org.jetbrains.annotations.Nullable; + +import static org.apache.ignite.internal.processors.rollingupgrade.feature.CoreFeatureRegistry.SNAPSHOT_DELETE_FEATURE; +import static org.apache.ignite.internal.util.distributed.DistributedProcess.DistributedProcessType.DELETE_SNAPSHOT; +import static org.apache.ignite.plugin.security.SecurityPermission.ADMIN_SNAPSHOT; + +/** + * Distributed process to delete a cluster snapshot. The operation is rejected if any concurrent snapshot operation is + * active. + */ +public class SnapshotDeleteProcess { + /** Reject operation messages. */ + private static final String OP_REJECT_MSG = "Snapshot deletion was rejected. "; + + /** */ + public static final String OP_REJECT_FEATURE_MSG = OP_REJECT_MSG + "The snapshot deletion feature isn't activated yet."; + + /** */ + private static final String CONCURRENT_OP_PREF = "Snapshot with the same name is being "; + + /** */ + public static final String BEING_CREATED_PREF = CONCURRENT_OP_PREF + "created "; + + /** */ + public static final String BEING_RESTORED_PREF = CONCURRENT_OP_PREF + "restored "; + + /** */ + public static final String BEING_CHECKED_PREF = CONCURRENT_OP_PREF + "checked "; + + /** Kernal context. */ + private final GridKernalContext kctx; + + /** Logger. */ + private final IgniteLogger log; + + /** */ + private volatile boolean interrupted; + + /** Cluster-wide operation futures per request id on certain node. */ + private final Map<UUID, GridFutureAdapter<SnapshotDeleteProcessResult>> clusterOpFuts = new ConcurrentHashMap<>(); + + /** Current operations represented by the full canonical path. */ + private final Set<File> requests = ConcurrentHashMap.newKeySet(); + + /** The distributed process. */ + private final DistributedProcess<SnapshotDeleteRequest, SnapshotDeleteResponse> distrProc; + + /** + * @param ctx Kernal context. + */ + public SnapshotDeleteProcess(GridKernalContext ctx) { + kctx = ctx; + + log = ctx.log(getClass()); + + distrProc = new DistributedProcess<>(ctx, DELETE_SNAPSHOT, this::deletePhase, this::reducePhase); + } + + /** + * Starts the cluster snapshot delete process. + * + * @param snpName Snapshot name. + * @param snpPath Snapshot directory path (optional). + * @return Future that will be completed when the snapshot is deleted. + */ + public IgniteInternalFuture<SnapshotDeleteProcessResult> start(String snpName, @Nullable String snpPath) { + GridFutureAdapter<SnapshotDeleteProcessResult> clusterOpFut = new GridFutureAdapter<>(); + + if (!kctx.rollingUpgrade().features().isActive(SNAPSHOT_DELETE_FEATURE)) { + clusterOpFut.onDone(new IgniteIllegalStateException(OP_REJECT_FEATURE_MSG)); + + return clusterOpFut; + } + + UUID reqId = UUID.randomUUID(); + + clusterOpFut.listen(fut -> clusterOpFuts.remove(reqId)); + + try { + if (interrupted || kctx.isStopping()) + throw new NodeStoppingException("Failed to start snapshot delete process: node is stopping."); + + clusterOpFuts.put(reqId, clusterOpFut); + + SnapshotDeleteRequest req = new SnapshotDeleteRequest(reqId, snpName, snpPath); + + distrProc.start(reqId, req); + } + catch (Throwable t) { + log.error("Failed to start distributed delete snapshot process [snpName=" + snpName + ", snpPath=" + snpPath + ']', t); + + clusterOpFut.onDone(t); + } + + return clusterOpFut; + } + + /** */ + private IgniteInternalFuture<SnapshotDeleteResponse> deletePhase(UUID ignored, SnapshotDeleteRequest req) { + if (interrupted || kctx.isStopping()) { + return new GridFinishedFuture<>(new NodeStoppingException(OP_REJECT_MSG + + " Node is stopping [req=" + req + ']')); + } + + if (kctx.cluster().get().localNode().isClient()) + return new GridFinishedFuture<>(new SnapshotDeleteResponse()); + + kctx.security().authorize(ADMIN_SNAPSHOT); + + IgniteSnapshotManager snpMgr = kctx.cache().context().snapshotMgr(); + + SnapshotOperationRequest curCreateRq = snpMgr.currentCreateRequest(); + + if (curCreateRq != null && curCreateRq.snpName.equalsIgnoreCase(req.snpName)) { + return new GridFinishedFuture<>(new IgniteIllegalStateException(OP_REJECT_MSG + BEING_CREATED_PREF + + "[req=" + req + ']')); + } + + if (snpMgr.isRestoring(req.snpName)) { + return new GridFinishedFuture<>(new IgniteIllegalStateException(OP_REJECT_MSG + BEING_RESTORED_PREF + + "[req=" + req + ']')); + } + + if (snpMgr.isSnapshotChecking(req.snpName)) { + return new GridFinishedFuture<>(new IgniteIllegalStateException(OP_REJECT_MSG + BEING_CHECKED_PREF + + "[req=" + req + ']')); + } + + File resolvedFullPath = null; + + // Future to delete snapshot contents according to snapshot metadatas. + GridFutureAdapter<SnapshotDeleteResponse> resultFut = new GridFutureAdapter<>(); + + try { + resolvedFullPath = resolveFullPath(req.snpName, req.snpPath); + + if (!requests.add(resolvedFullPath)) { + return new GridFinishedFuture<>(new IgniteIllegalStateException("Deletion of the snapshot has already " + + "started [req=" + req + ']')); + } + + File rootPath = resolvedFullPath.getParentFile(); + + SnapshotFileTree snpFiles = new SnapshotFileTree(kctx, req.snpName, rootPath.getAbsolutePath()); + + // We need to find and read snapshot metas to ensure the content is a snapshot. Also, the metas contain + // initial cluster topology and actual snapshot folder names. + List<SnapshotMetadata> locMetas = kctx.cache().context().snapshotMgr().readSnapshotMetadatas(snpFiles, false); Review Comment: This seems not so critical. On separated nodes, with own working directory, there is one snapshot. In the shared snapshot folder, we'll try to remove entire if just one meta is read. It is ok to me. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
