1 files changed, 90 insertions, 0 deletions
diff --git a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerReportManagerImpl.java b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerReportManagerImpl.java
new file mode 100644
index 0000000000..6c83c66a3a
--- /dev/null
+++ b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerReportManagerImpl.java
@@ -0,0 +1,90 @@
+/*
+ * 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.hadoop.ozone.container.common.impl;
+
+import org.apache.commons.lang3.RandomUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdds.protocol.proto
+    .StorageContainerDatanodeProtocolProtos.ReportState;
+import org.apache.hadoop.ozone.OzoneConfigKeys;
+import org.apache.hadoop.ozone.container.common.interfaces
+    .ContainerReportManager;
+import org.apache.hadoop.util.Time;
+
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.apache.hadoop.hdds.scm.HddsServerUtil.getScmHeartbeatInterval;
+
+/**
+ * Class wraps the container report operations on datanode.
+ * // TODO: support incremental/delta container report
+ */
+public class ContainerReportManagerImpl implements ContainerReportManager {
+  // Last non-empty container report time
+  private long lastContainerReportTime;
+  private final long containerReportInterval;
+  private final long heartbeatInterval;
+  private AtomicLong reportCount;
+  private static final ReportState NO_CONTAINER_REPORTSTATE =
+      ReportState.newBuilder()
+          .setState(ReportState.states.noContainerReports)
+          .setCount(0).build();
+
+  public ContainerReportManagerImpl(Configuration config) {
+    this.lastContainerReportTime = -1;
+    this.reportCount = new AtomicLong(0L);
+    this.containerReportInterval = config.getTimeDuration(
+        OzoneConfigKeys.OZONE_CONTAINER_REPORT_INTERVAL,
+        OzoneConfigKeys.OZONE_CONTAINER_REPORT_INTERVAL_DEFAULT,
+        TimeUnit.MILLISECONDS);
+    this.heartbeatInterval = getScmHeartbeatInterval(config);
+  }
+
+  public ReportState getContainerReportState() {
+    if (lastContainerReportTime < 0) {
+      return getFullContainerReportState();
+    } else {
+      // Add a random delay (0~30s) on top of the container report
+      // interval (60s) so tha the SCM is overwhelmed by the container reports
+      // sent in sync.
+      if (Time.monotonicNow() - lastContainerReportTime >
+          (containerReportInterval + getRandomReportDelay())) {
+        return getFullContainerReportState();
+      } else {
+        return getNoContainerReportState();
+      }
+    }
+  }
+
+  private ReportState getFullContainerReportState() {
+    ReportState.Builder rsBuilder = ReportState.newBuilder();
+    rsBuilder.setState(ReportState.states.completeContinerReport);
+    rsBuilder.setCount(reportCount.incrementAndGet());
+    this.lastContainerReportTime = Time.monotonicNow();
+    return rsBuilder.build();
+  }
+
+  private ReportState getNoContainerReportState() {
+    return NO_CONTAINER_REPORTSTATE;
+  }
+
+  private long getRandomReportDelay() {
+    return RandomUtils.nextLong(0, heartbeatInterval);
+  }
+}