content: /*
   * 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 com.alibaba.compileflow.engine.core.runtime.compilation;
  
  import com.alibaba.compileflow.engine.core.infrastructure.utils.ExecutorUtils;
  import com.alibaba.compileflow.engine.core.runtime.ProcessRuntimeWrapper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.concurrent.*;
  
  
  /**
   * @author yusu
   */
  public class DefaultInflightCompilationRegistry implements InflightCompilationRegistry {
  
      private static final Logger LOGGER = LoggerFactory.getLogger(DefaultInflightCompilationRegistry.class);
  
      private final Map<String, CompletableFuture<ProcessRuntimeWrapper>> inflight = new ConcurrentHashMap<>();
  
      @Override
      public CompletableFuture<ProcessRuntimeWrapper> putIfAbsent(String digest, CompletableFuture<ProcessRuntimeWrapper> slot) {
          CompletableFuture<ProcessRuntimeWrapper> existing = inflight.putIfAbsent(digest, slot);
          return existing != null ? existing : slot;
      }
  
      @Override
      public void remove(String digest, CompletableFuture<ProcessRuntimeWrapper> slot) {
          inflight.remove(digest, slot);
      }
  
      @Override
      public Collection<CompletableFuture<ProcessRuntimeWrapper>> values() {
          return inflight.values();
      }
  
      @Override
      public int size() {
          return inflight.size();
      }
  
      @Override
      public void clear() {
          inflight.clear();
      }
  
      @Override
      public void close() throws Exception {
          long start = System.currentTimeMillis();
          int inflightCount = inflight.size();
  
          if (inflightCount == 0) {
              LOGGER.info("InflightCompilationRegistry closing: no pending compilations.");
              return;
          }
  
          LOGGER.info("InflightCompilationRegistry closing: awaiting {} pending compilations (timeout: 5s)...", inflightCount);
  
          try {
              CompletableFuture<Void> all = CompletableFuture.allOf(
                      inflight.values().toArray(new CompletableFuture[0]));
              ExecutorUtils.getWithTimeout(all, 5000L);
              LOGGER.info("All {} inflight compilations completed successfully.", inflightCount);
          } catch (TimeoutException te) {
              LOGGER.warn("Timeout waiting for inflight compilations. Cancelling {} remaining tasks...", inflight.size());
              ExecutorUtils.cancelUnfinished(inflight.values());
          } catch (InterruptedException ie) {
              Thread.currentThread().interrupt();
              LOGGER.warn("Interrupted while waiting for inflight compilations. Cancelling all pending tasks...", ie);
              ExecutorUtils.cancelUnfinished(inflight.values());
          } catch (CancellationException ce) {
              LOGGER.warn("Some inflight compilations were cancelled during shutdown.");
              ExecutorUtils.cancelUnfinished(inflight.values());
          } catch (ExecutionException ee) {
              LOGGER.warn("Some inflight compilations failed during shutdown.", ee.getCause());
          } finally {
              inflight.clear();
              LOGGER.info("InflightCompilationRegistry shutdown complete in {}ms.", (System.currentTimeMillis() - start));
          }
      }
  
  }
  
  
  