feat(s3stream): add strict check mode (#834)

Signed-off-by: Robin Han <[email protected]>

s3stream/src/main/java/com/automq/stream/s3/S3Stream.java

@@ -36,6 +36,7 @@
 import com.automq.stream.s3.network.AsyncNetworkBandwidthLimiter;
 import com.automq.stream.s3.streams.StreamManager;
 import com.automq.stream.utils.FutureUtil;
+import com.automq.stream.utils.GlobalSwitch;
 import io.netty.buffer.Unpooled;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -292,7 +293,9 @@ public CompletableFuture<Void> close() {
 
             // await all pending append/fetch/trim request
             List<CompletableFuture<?>> pendingRequests = new ArrayList<>(pendingAppends);
-            pendingRequests.addAll(pendingFetches);
+            if (GlobalSwitch.STRICT) {
+                pendingRequests.addAll(pendingFetches);
+            }
             pendingRequests.add(lastPendingTrim);
             CompletableFuture<Void> awaitPendingRequestsCf = CompletableFuture.allOf(pendingRequests.toArray(new CompletableFuture[0]));
             CompletableFuture<Void> closeCf = new CompletableFuture<>();

s3stream/src/main/java/com/automq/stream/utils/GlobalSwitch.java

@@ -0,0 +1,33 @@
+/*
+ * 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.automq.stream.utils;
+
+public class GlobalSwitch {
+
+    public static final boolean STRICT = getBoolean("AUTOMQ_S3STREAM_STRICT", false);
+
+    private static boolean getBoolean(String name, boolean defaultValue) {
+        String value = System.getenv(name);
+        if (value == null) {
+            return defaultValue;
+        } else {
+            return Boolean.parseBoolean(value);
+        }
+    }
+
+}