HDDS-15839. Implement SCM container ID export manager

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/container/export/ExportLimits.java

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+/*
+ * 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.hdds.scm.container.export;
+
+/**
+ * Shared limits and defaults for container ID export.
+ */
+public final class ExportLimits {
+
+  public static final String EXPORT_SUBDIR = "exports";
+
+  public static final int DEFAULT_PAGE_SIZE = 100_000;
+  public static final int DEFAULT_SHARD_SIZE = 500_000;
+  public static final int MAX_PAGE_SIZE = 1_000_000;
+  public static final int MAX_SHARD_SIZE = 5_000_000;
+
+  private ExportLimits() {
+  }
+}

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/container/export/package-info.java

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+/*
+ * 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.
+ */
+
+/**
+ * This package contains classes related to container export.
+ */
+package org.apache.hadoop.hdds.scm.container.export;