1 files changed, 326 insertions, 0 deletions
diff --git a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java
new file mode 100644
index 0000000000..c29374c07c
--- /dev/null
+++ b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java
@@ -0,0 +1,326 @@
+/*
+ * 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.helpers;
+
+import org.apache.commons.codec.digest.DigestUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdds.scm.ScmConfigKeys;
+import org.apache.hadoop.hdds.protocol.proto.ContainerProtos;
+import org.apache.hadoop.hdds.protocol.proto.HddsProtos;
+import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.util.Time;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * This class maintains the information about a container in the ozone world.
+ * <p>
+ * A container is a name, along with metadata- which is a set of key value
+ * pair.
+ */
+public class ContainerData {
+
+  private final String containerName;
+  private final Map<String, String> metadata;
+  private String dbPath;  // Path to Level DB Store.
+  // Path to Physical file system where container and checksum are stored.
+  private String containerFilePath;
+  private String hash;
+  private AtomicLong bytesUsed;
+  private long maxSize;
+  private Long containerID;
+  private HddsProtos.LifeCycleState state;
+
+  /**
+   * Constructs a  ContainerData Object.
+   *
+   * @param containerName - Name
+   */
+  public ContainerData(String containerName, Long containerID,
+      Configuration conf) {
+    this.metadata = new TreeMap<>();
+    this.containerName = containerName;
+    this.maxSize = conf.getLong(ScmConfigKeys.SCM_CONTAINER_CLIENT_MAX_SIZE_KEY,
+        ScmConfigKeys.SCM_CONTAINER_CLIENT_MAX_SIZE_DEFAULT) * OzoneConsts.GB;
+    this.bytesUsed =  new AtomicLong(0L);
+    this.containerID = containerID;
+    this.state = HddsProtos.LifeCycleState.OPEN;
+  }
+
+  /**
+   * Constructs a ContainerData object from ProtoBuf classes.
+   *
+   * @param protoData - ProtoBuf Message
+   * @throws IOException
+   */
+  public static ContainerData getFromProtBuf(
+      ContainerProtos.ContainerData protoData, Configuration conf)
+      throws IOException {
+    ContainerData data = new ContainerData(protoData.getName(),
+        protoData.getContainerID(), conf);
+    for (int x = 0; x < protoData.getMetadataCount(); x++) {
+      data.addMetadata(protoData.getMetadata(x).getKey(),
+          protoData.getMetadata(x).getValue());
+    }
+
+    if (protoData.hasContainerPath()) {
+      data.setContainerPath(protoData.getContainerPath());
+    }
+
+    if (protoData.hasDbPath()) {
+      data.setDBPath(protoData.getDbPath());
+    }
+
+    if (protoData.hasState()) {
+      data.setState(protoData.getState());
+    }
+
+    if(protoData.hasHash()) {
+      data.setHash(protoData.getHash());
+    }
+
+    if (protoData.hasBytesUsed()) {
+      data.setBytesUsed(protoData.getBytesUsed());
+    }
+
+    if (protoData.hasSize()) {
+      data.setMaxSize(protoData.getSize());
+    }
+    return data;
+  }
+
+  /**
+   * Returns a ProtoBuf Message from ContainerData.
+   *
+   * @return Protocol Buffer Message
+   */
+  public ContainerProtos.ContainerData getProtoBufMessage() {
+    ContainerProtos.ContainerData.Builder builder = ContainerProtos
+        .ContainerData.newBuilder();
+    builder.setName(this.getContainerName());
+    builder.setContainerID(this.getContainerID());
+
+    if (this.getDBPath() != null) {
+      builder.setDbPath(this.getDBPath());
+    }
+
+    if (this.getHash() != null) {
+      builder.setHash(this.getHash());
+    }
+
+    if (this.getContainerPath() != null) {
+      builder.setContainerPath(this.getContainerPath());
+    }
+
+    builder.setState(this.getState());
+
+    for (Map.Entry<String, String> entry : metadata.entrySet()) {
+      HddsProtos.KeyValue.Builder keyValBuilder =
+          HddsProtos.KeyValue.newBuilder();
+      builder.addMetadata(keyValBuilder.setKey(entry.getKey())
+          .setValue(entry.getValue()).build());
+    }
+
+    if (this.getBytesUsed() >= 0) {
+      builder.setBytesUsed(this.getBytesUsed());
+    }
+
+    if (this.getKeyCount() >= 0) {
+      builder.setKeyCount(this.getKeyCount());
+    }
+
+    if (this.getMaxSize() >= 0) {
+      builder.setSize(this.getMaxSize());
+    }
+
+    return builder.build();
+  }
+
+  /**
+   * Returns the name of the container.
+   *
+   * @return - name
+   */
+  public String getContainerName() {
+    return containerName;
+  }
+
+  /**
+   * Adds metadata.
+   */
+  public void addMetadata(String key, String value) throws IOException {
+    synchronized (this.metadata) {
+      if (this.metadata.containsKey(key)) {
+        throw new IOException("This key already exists. Key " + key);
+      }
+      metadata.put(key, value);
+    }
+  }
+
+  /**
+   * Returns all metadata.
+   */
+  public Map<String, String> getAllMetadata() {
+    synchronized (this.metadata) {
+      return Collections.unmodifiableMap(this.metadata);
+    }
+  }
+
+  /**
+   * Returns value of a key.
+   */
+  public String getValue(String key) {
+    synchronized (this.metadata) {
+      return metadata.get(key);
+    }
+  }
+
+  /**
+   * Deletes a metadata entry from the map.
+   *
+   * @param key - Key
+   */
+  public void deleteKey(String key) {
+    synchronized (this.metadata) {
+      metadata.remove(key);
+    }
+  }
+
+  /**
+   * Returns path.
+   *
+   * @return - path
+   */
+  public String getDBPath() {
+    return dbPath;
+  }
+
+  /**
+   * Sets path.
+   *
+   * @param path - String.
+   */
+  public void setDBPath(String path) {
+    this.dbPath = path;
+  }
+
+  /**
+   * This function serves as the generic key for ContainerCache class. Both
+   * ContainerData and ContainerKeyData overrides this function to appropriately
+   * return the right name that can  be used in ContainerCache.
+   *
+   * @return String Name.
+   */
+  public String getName() {
+    return getContainerName();
+  }
+
+  /**
+   * Get container file path.
+   * @return - Physical path where container file and checksum is stored.
+   */
+  public String getContainerPath() {
+    return containerFilePath;
+  }
+
+  /**
+   * Set container Path.
+   * @param containerPath - File path.
+   */
+  public void setContainerPath(String containerPath) {
+    this.containerFilePath = containerPath;
+  }
+
+  /**
+   * Get container ID.
+   * @return - container ID.
+   */
+  public synchronized Long getContainerID() {
+    return containerID;
+  }
+
+  public synchronized  void setState(HddsProtos.LifeCycleState state) {
+    this.state = state;
+  }
+
+  public synchronized HddsProtos.LifeCycleState getState() {
+    return this.state;
+  }
+
+  /**
+   * checks if the container is open.
+   * @return - boolean
+   */
+  public synchronized  boolean isOpen() {
+    return HddsProtos.LifeCycleState.OPEN == state;
+  }
+
+  /**
+   * Marks this container as closed.
+   */
+  public synchronized void closeContainer() {
+    // TODO: closed or closing here
+    setState(HddsProtos.LifeCycleState.CLOSED);
+
+    // Some thing brain dead for now. name + Time stamp of when we get the close
+    // container message.
+    setHash(DigestUtils.sha256Hex(this.getContainerName() +
+        Long.toString(Time.monotonicNow())));
+  }
+
+  /**
+   * Final hash for this container.
+   * @return - Hash
+   */
+  public String getHash() {
+    return hash;
+  }
+
+  public void setHash(String hash) {
+    this.hash = hash;
+  }
+
+  public void setMaxSize(long maxSize) {
+    this.maxSize = maxSize;
+  }
+
+  public long getMaxSize() {
+    return maxSize;
+  }
+
+  public long getKeyCount() {
+    return metadata.size();
+  }
+
+  public void setBytesUsed(long used) {
+    this.bytesUsed.set(used);
+  }
+
+  public long addBytesUsed(long delta) {
+    return this.bytesUsed.addAndGet(delta);
+  }
+
+  public long getBytesUsed() {
+    return bytesUsed.get();
+  }
+}