| /* |
| * 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.druid.metadata; |
| |
| import com.fasterxml.jackson.annotation.JsonCreator; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.common.hash.Hasher; |
| import com.google.common.hash.Hashing; |
| import com.google.common.io.BaseEncoding; |
| import org.apache.druid.java.util.common.StringUtils; |
| import org.apache.druid.segment.realtime.appenderator.SegmentIdWithShardSpec; |
| import org.joda.time.Interval; |
| |
| import javax.annotation.Nullable; |
| import java.sql.ResultSet; |
| |
| /** |
| * Representation of a record in the pending segments table. <br/> |
| * Mapping of column in table to field: |
| * |
| * <ul> |
| * <li> id -> id (Unique identifier for pending segment) <li/> |
| * <li> sequence_name -> sequenceName (sequence name used for segment allocation) <li/> |
| * <li> sequence_prev_id -> sequencePrevId (previous segment id used for segment allocation) <li/> |
| * <li> upgraded_from_segment_id -> upgradedFromSegmentId (Id of the root segment from which this was upgraded) <li/> |
| * <li> task_allocator_id -> taskAllocatorId (Associates a task / task group / replica group with the pending segment) <li/> |
| * </ul> |
| */ |
| public class PendingSegmentRecord |
| { |
| private final SegmentIdWithShardSpec id; |
| private final String sequenceName; |
| private final String sequencePrevId; |
| private final String upgradedFromSegmentId; |
| private final String taskAllocatorId; |
| |
| @JsonCreator |
| public PendingSegmentRecord( |
| @JsonProperty("id") SegmentIdWithShardSpec id, |
| @JsonProperty("sequenceName") String sequenceName, |
| @JsonProperty("sequencePrevId") String sequencePrevId, |
| @JsonProperty("upgradedFromSegmentId") @Nullable String upgradedFromSegmentId, |
| @JsonProperty("taskAllocatorId") @Nullable String taskAllocatorId |
| ) |
| { |
| this.id = id; |
| this.sequenceName = sequenceName; |
| this.sequencePrevId = sequencePrevId; |
| this.upgradedFromSegmentId = upgradedFromSegmentId; |
| this.taskAllocatorId = taskAllocatorId; |
| } |
| |
| @JsonProperty |
| public SegmentIdWithShardSpec getId() |
| { |
| return id; |
| } |
| |
| @JsonProperty |
| public String getSequenceName() |
| { |
| return sequenceName; |
| } |
| |
| @JsonProperty |
| public String getSequencePrevId() |
| { |
| return sequencePrevId; |
| } |
| |
| /** |
| * The original pending segment using which this upgraded segment was created. |
| * Can be null for pending segments allocated before this column was added or for segments that have not been upgraded. |
| */ |
| @Nullable |
| @JsonProperty |
| public String getUpgradedFromSegmentId() |
| { |
| return upgradedFromSegmentId; |
| } |
| |
| /** |
| * task / taskGroup / replica group of task that allocated this segment. |
| * Can be null for pending segments allocated before this column was added. |
| */ |
| @Nullable |
| @JsonProperty |
| public String getTaskAllocatorId() |
| { |
| return taskAllocatorId; |
| } |
| |
| @SuppressWarnings("UnstableApiUsage") |
| public String computeSequenceNamePrevIdSha1(boolean skipSegmentLineageCheck) |
| { |
| final Hasher hasher = Hashing.sha1().newHasher() |
| .putBytes(StringUtils.toUtf8(getSequenceName())) |
| .putByte((byte) 0xff); |
| |
| if (skipSegmentLineageCheck) { |
| final Interval interval = getId().getInterval(); |
| hasher |
| .putLong(interval.getStartMillis()) |
| .putLong(interval.getEndMillis()); |
| } else { |
| hasher |
| .putBytes(StringUtils.toUtf8(getSequencePrevId())); |
| } |
| |
| hasher.putByte((byte) 0xff); |
| hasher.putBytes(StringUtils.toUtf8(getId().getVersion())); |
| |
| return BaseEncoding.base16().encode(hasher.hash().asBytes()); |
| } |
| |
| public static PendingSegmentRecord fromResultSet(ResultSet resultSet, ObjectMapper jsonMapper) |
| { |
| try { |
| final byte[] payload = resultSet.getBytes("payload"); |
| return new PendingSegmentRecord( |
| jsonMapper.readValue(payload, SegmentIdWithShardSpec.class), |
| resultSet.getString("sequence_name"), |
| resultSet.getString("sequence_prev_id"), |
| resultSet.getString("upgraded_from_segment_id"), |
| resultSet.getString("task_allocator_id") |
| ); |
| } |
| catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |