xtern commented on code in PR #4699: URL: https://github.com/apache/ignite-3/pull/4699#discussion_r1837904566
########## modules/compute/src/main/java/org/apache/ignite/internal/compute/ComputeViewProvider.java: ########## @@ -0,0 +1,105 @@ +/* + * 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.compute; + +import static org.apache.ignite.internal.type.NativeTypes.stringOf; + +import java.util.Iterator; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.Flow.Publisher; +import java.util.concurrent.Flow.Subscription; +import org.apache.ignite.compute.JobState; +import org.apache.ignite.internal.systemview.api.SystemView; +import org.apache.ignite.internal.systemview.api.SystemViews; +import org.apache.ignite.internal.type.NativeType; +import org.apache.ignite.internal.type.NativeTypes; +import org.jetbrains.annotations.Nullable; + +/** Provider that creates system view exposes information about currently running compute tasks hosted by a node. */ +public class ComputeViewProvider { + private final CompletableFuture<ExecutionManager> startFuture = new CompletableFuture<>(); + + /** Initializes with compute aware manager. */ + public void init(ExecutionManager executionManager) { + startFuture.complete(executionManager); + } + + /** Returns system view exposes information about currently running tasks. */ + public SystemView<?> get() { + NativeType idType = stringOf(36); + + NativeType timestampType = NativeTypes.timestamp(NativeTypes.MAX_TIME_PRECISION); + + return SystemViews.<JobState>nodeViewBuilder() + .name("COMPUTE_TASKS") + .nodeNameColumnAlias("COORDINATOR_NODE_ID") + .addColumn("ID", idType, info -> info.id().toString()) + .addColumn("STATUS", stringOf(10), info -> info.status().name()) + .addColumn("CREATE_TIME", timestampType, JobState::createTime) + .addColumn("START_TIME", timestampType, JobState::startTime) + .addColumn("FINISH_TIME", timestampType, JobState::finishTime) + .dataProvider(buildDataProvider()) + .build(); + } + + private Publisher<JobState> buildDataProvider() { Review Comment: I found two possible ways to re-use `SubscriptionUtils`: 1. Works out of the box, but uses "join()" :pensive: ``` Publisher<JobState> publisher = SubscriptionUtils.fromIterable( () -> startFuture.thenCompose(ExecutionManager::localStatesAsync).thenApply(List::iterator).join() ); ``` 2. Need to replace `CompletableFuture<Iterable<T>>` with `Supplier<CompletableFuture<Iterable<T>>>` in `IterableToPublisherAdapter`. After that in "subscribe()" instead of ``` CompletableFuture<Iterator<T>> itFuture = iterableFuture.thenApply(Iterable::iterator); ``` call ``` CompletableFuture<Iterator<T>> itFuture = iterableFuture.get().thenApply(Iterable::iterator); ``` After that we can pass Supplier to completable future. Publisher<JobState> publisher = SubscriptionUtils.fromIterable( () -> startFuture.thenCompose(ExecutionManager::localStatesAsync).thenApply(states -> states::iterator) ); Personally I vote for the second approach with supplier. -- 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: notifications-unsubscr...@ignite.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
