http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationColumnPrefix.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationColumnPrefix.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationColumnPrefix.java new file mode 100644 index 0000000..42488f4 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationColumnPrefix.java @@ -0,0 +1,288 @@ +/** + * 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.yarn.server.timelineservice.storage.application; + +import java.io.IOException; +import java.util.Map; +import java.util.NavigableMap; + +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnFamily; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.GenericConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.LongConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.Separator; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.TypedBufferedMutator; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ValueConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.flow.Attribute; + +/** + * Identifies partially qualified columns for the application table. + */ +public enum ApplicationColumnPrefix implements ColumnPrefix<ApplicationTable> { + + /** + * To store TimelineEntity getIsRelatedToEntities values. + */ + IS_RELATED_TO(ApplicationColumnFamily.INFO, "s"), + + /** + * To store TimelineEntity getRelatesToEntities values. + */ + RELATES_TO(ApplicationColumnFamily.INFO, "r"), + + /** + * To store TimelineEntity info values. + */ + INFO(ApplicationColumnFamily.INFO, "i"), + + /** + * Lifecycle events for an application. + */ + EVENT(ApplicationColumnFamily.INFO, "e"), + + /** + * Config column stores configuration with config key as the column name. + */ + CONFIG(ApplicationColumnFamily.CONFIGS, null), + + /** + * Metrics are stored with the metric name as the column name. + */ + METRIC(ApplicationColumnFamily.METRICS, null, new LongConverter()); + + private final ColumnHelper<ApplicationTable> column; + private final ColumnFamily<ApplicationTable> columnFamily; + + /** + * Can be null for those cases where the provided column qualifier is the + * entire column name. + */ + private final String columnPrefix; + private final byte[] columnPrefixBytes; + + /** + * Private constructor, meant to be used by the enum definition. + * + * @param columnFamily that this column is stored in. + * @param columnPrefix for this column. + */ + private ApplicationColumnPrefix(ColumnFamily<ApplicationTable> columnFamily, + String columnPrefix) { + this(columnFamily, columnPrefix, GenericConverter.getInstance()); + } + + /** + * Private constructor, meant to be used by the enum definition. + * + * @param columnFamily that this column is stored in. + * @param columnPrefix for this column. + * @param converter used to encode/decode values to be stored in HBase for + * this column prefix. + */ + private ApplicationColumnPrefix(ColumnFamily<ApplicationTable> columnFamily, + String columnPrefix, ValueConverter converter) { + column = new ColumnHelper<ApplicationTable>(columnFamily, converter); + this.columnFamily = columnFamily; + this.columnPrefix = columnPrefix; + if (columnPrefix == null) { + this.columnPrefixBytes = null; + } else { + // Future-proof by ensuring the right column prefix hygiene. + this.columnPrefixBytes = + Bytes.toBytes(Separator.SPACE.encode(columnPrefix)); + } + } + + /** + * @return the column name value + */ + private String getColumnPrefix() { + return columnPrefix; + } + + @Override + public byte[] getColumnPrefixBytes(byte[] qualifierPrefix) { + return ColumnHelper.getColumnQualifier( + this.columnPrefixBytes, qualifierPrefix); + } + + @Override + public byte[] getColumnPrefixBytes(String qualifierPrefix) { + return ColumnHelper.getColumnQualifier( + this.columnPrefixBytes, qualifierPrefix); + } + + @Override + public byte[] getColumnFamilyBytes() { + return columnFamily.getBytes(); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix + * #store(byte[], + * org.apache.hadoop.yarn.server.timelineservice.storage.common. + * TypedBufferedMutator, java.lang.String, java.lang.Long, java.lang.Object) + */ + public void store(byte[] rowKey, + TypedBufferedMutator<ApplicationTable> tableMutator, byte[] qualifier, + Long timestamp, Object inputValue, Attribute... attributes) + throws IOException { + + // Null check + if (qualifier == null) { + throw new IOException("Cannot store column with null qualifier in " + + tableMutator.getName().getNameAsString()); + } + + byte[] columnQualifier = getColumnPrefixBytes(qualifier); + + column.store(rowKey, tableMutator, columnQualifier, timestamp, inputValue, + attributes); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix + * #store(byte[], + * org.apache.hadoop.yarn.server.timelineservice.storage.common. + * TypedBufferedMutator, java.lang.String, java.lang.Long, java.lang.Object) + */ + public void store(byte[] rowKey, + TypedBufferedMutator<ApplicationTable> tableMutator, String qualifier, + Long timestamp, Object inputValue, Attribute...attributes) + throws IOException { + + // Null check + if (qualifier == null) { + throw new IOException("Cannot store column with null qualifier in " + + tableMutator.getName().getNameAsString()); + } + + byte[] columnQualifier = getColumnPrefixBytes(qualifier); + + column.store(rowKey, tableMutator, columnQualifier, timestamp, inputValue, + attributes); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix + * #readResult(org.apache.hadoop.hbase.client.Result, java.lang.String) + */ + public Object readResult(Result result, String qualifier) throws IOException { + byte[] columnQualifier = + ColumnHelper.getColumnQualifier(this.columnPrefixBytes, qualifier); + return column.readResult(result, columnQualifier); + } + + public ValueConverter getValueConverter() { + return column.getValueConverter(); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix + * #readResults(org.apache.hadoop.hbase.client.Result, + * org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter) + */ + public <K> Map<K, Object> readResults(Result result, + KeyConverter<K> keyConverter) throws IOException { + return column.readResults(result, columnPrefixBytes, keyConverter); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnPrefix + * #readResultsWithTimestamps(org.apache.hadoop.hbase.client.Result, + * org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter) + */ + public <K, V> NavigableMap<K, NavigableMap<Long, V>> + readResultsWithTimestamps(Result result, KeyConverter<K> keyConverter) + throws IOException { + return column.readResultsWithTimestamps(result, columnPrefixBytes, + keyConverter); + } + + /** + * Retrieve an {@link ApplicationColumnPrefix} given a name, or null if there + * is no match. The following holds true: {@code columnFor(x) == columnFor(y)} + * if and only if {@code x.equals(y)} or {@code (x == y == null)} + * + * @param columnPrefix Name of the column to retrieve + * @return the corresponding {@link ApplicationColumnPrefix} or null + */ + public static final ApplicationColumnPrefix columnFor(String columnPrefix) { + + // Match column based on value, assume column family matches. + for (ApplicationColumnPrefix acp : ApplicationColumnPrefix.values()) { + // Find a match based only on name. + if (acp.getColumnPrefix().equals(columnPrefix)) { + return acp; + } + } + + // Default to null + return null; + } + + /** + * Retrieve an {@link ApplicationColumnPrefix} given a name, or null if there + * is no match. The following holds true: + * {@code columnFor(a,x) == columnFor(b,y)} if and only if + * {@code (x == y == null)} or {@code a.equals(b) & x.equals(y)} + * + * @param columnFamily The columnFamily for which to retrieve the column. + * @param columnPrefix Name of the column to retrieve + * @return the corresponding {@link ApplicationColumnPrefix} or null if both + * arguments don't match. + */ + public static final ApplicationColumnPrefix columnFor( + ApplicationColumnFamily columnFamily, String columnPrefix) { + + // TODO: needs unit test to confirm and need to update javadoc to explain + // null prefix case. + + for (ApplicationColumnPrefix acp : ApplicationColumnPrefix.values()) { + // Find a match based column family and on name. + if (acp.columnFamily.equals(columnFamily) + && (((columnPrefix == null) && (acp.getColumnPrefix() == null)) || + (acp.getColumnPrefix().equals(columnPrefix)))) { + return acp; + } + } + + // Default to null + return null; + } + +}
http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKey.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKey.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKey.java new file mode 100644 index 0000000..da62fdf --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKey.java @@ -0,0 +1,206 @@ +/** + * 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.yarn.server.timelineservice.storage.application; + +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.AppIdKeyConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.LongConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.Separator; + +/** + * Represents a rowkey for the application table. + */ +public class ApplicationRowKey { + private final String clusterId; + private final String userId; + private final String flowName; + private final Long flowRunId; + private final String appId; + private final KeyConverter<ApplicationRowKey> appRowKeyConverter = + new ApplicationRowKeyConverter(); + + public ApplicationRowKey(String clusterId, String userId, String flowName, + Long flowRunId, String appId) { + this.clusterId = clusterId; + this.userId = userId; + this.flowName = flowName; + this.flowRunId = flowRunId; + this.appId = appId; + } + + public String getClusterId() { + return clusterId; + } + + public String getUserId() { + return userId; + } + + public String getFlowName() { + return flowName; + } + + public Long getFlowRunId() { + return flowRunId; + } + + public String getAppId() { + return appId; + } + + /** + * Constructs a row key for the application table as follows: + * {@code clusterId!userName!flowName!flowRunId!AppId}. + * + * @return byte array with the row key + */ + public byte[] getRowKey() { + return appRowKeyConverter.encode(this); + } + + /** + * Given the raw row key as bytes, returns the row key as an object. + * + * @param rowKey Byte representation of row key. + * @return An <cite>ApplicationRowKey</cite> object. + */ + public static ApplicationRowKey parseRowKey(byte[] rowKey) { + return new ApplicationRowKeyConverter().decode(rowKey); + } + + /** + * Encodes and decodes row key for application table. The row key is of the + * form: clusterId!userName!flowName!flowRunId!appId. flowRunId is a long, + * appId is encoded and decoded using {@link AppIdKeyConverter} and rest are + * strings. + * <p> + */ + final private static class ApplicationRowKeyConverter implements + KeyConverter<ApplicationRowKey> { + + private final KeyConverter<String> appIDKeyConverter = + new AppIdKeyConverter(); + + /** + * Intended for use in ApplicationRowKey only. + */ + private ApplicationRowKeyConverter() { + } + + /** + * Application row key is of the form + * clusterId!userName!flowName!flowRunId!appId with each segment separated + * by !. The sizes below indicate sizes of each one of these segements in + * sequence. clusterId, userName and flowName are strings. flowrunId is a + * long hence 8 bytes in size. app id is represented as 12 bytes with + * cluster timestamp part of appid takes 8 bytes(long) and seq id takes 4 + * bytes(int). Strings are variable in size (i.e. end whenever separator is + * encountered). This is used while decoding and helps in determining where + * to split. + */ + private static final int[] SEGMENT_SIZES = {Separator.VARIABLE_SIZE, + Separator.VARIABLE_SIZE, Separator.VARIABLE_SIZE, Bytes.SIZEOF_LONG, + AppIdKeyConverter.getKeySize() }; + + /* + * (non-Javadoc) + * + * Encodes ApplicationRowKey object into a byte array with each + * component/field in ApplicationRowKey separated by Separator#QUALIFIERS. + * This leads to an application table row key of the form + * clusterId!userName!flowName!flowRunId!appId If flowRunId in passed + * ApplicationRowKey object is null (and the fields preceding it i.e. + * clusterId, userId and flowName are not null), this returns a row key + * prefix of the form clusterId!userName!flowName! and if appId in + * ApplicationRowKey is null (other 4 components all are not null), this + * returns a row key prefix of the form + * clusterId!userName!flowName!flowRunId! flowRunId is inverted while + * encoding as it helps maintain a descending order for row keys in the + * application table. + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common + * .KeyConverter#encode(java.lang.Object) + */ + @Override + public byte[] encode(ApplicationRowKey rowKey) { + byte[] cluster = + Separator.encode(rowKey.getClusterId(), Separator.SPACE, + Separator.TAB, Separator.QUALIFIERS); + byte[] user = + Separator.encode(rowKey.getUserId(), Separator.SPACE, Separator.TAB, + Separator.QUALIFIERS); + byte[] flow = + Separator.encode(rowKey.getFlowName(), Separator.SPACE, + Separator.TAB, Separator.QUALIFIERS); + byte[] first = Separator.QUALIFIERS.join(cluster, user, flow); + // Note that flowRunId is a long, so we can't encode them all at the same + // time. + if (rowKey.getFlowRunId() == null) { + return Separator.QUALIFIERS.join(first, Separator.EMPTY_BYTES); + } + byte[] second = + Bytes.toBytes(LongConverter.invertLong( + rowKey.getFlowRunId())); + if (rowKey.getAppId() == null || rowKey.getAppId().isEmpty()) { + return Separator.QUALIFIERS.join(first, second, Separator.EMPTY_BYTES); + } + byte[] third = appIDKeyConverter.encode(rowKey.getAppId()); + return Separator.QUALIFIERS.join(first, second, third); + } + + /* + * (non-Javadoc) + * + * Decodes an application row key of the form + * clusterId!userName!flowName!flowRunId!appId represented in byte format + * and converts it into an ApplicationRowKey object.flowRunId is inverted + * while decoding as it was inverted while encoding. + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common + * .KeyConverter#decode(byte[]) + */ + @Override + public ApplicationRowKey decode(byte[] rowKey) { + byte[][] rowKeyComponents = + Separator.QUALIFIERS.split(rowKey, SEGMENT_SIZES); + if (rowKeyComponents.length != 5) { + throw new IllegalArgumentException("the row key is not valid for " + + "an application"); + } + String clusterId = + Separator.decode(Bytes.toString(rowKeyComponents[0]), + Separator.QUALIFIERS, Separator.TAB, Separator.SPACE); + String userId = + Separator.decode(Bytes.toString(rowKeyComponents[1]), + Separator.QUALIFIERS, Separator.TAB, Separator.SPACE); + String flowName = + Separator.decode(Bytes.toString(rowKeyComponents[2]), + Separator.QUALIFIERS, Separator.TAB, Separator.SPACE); + Long flowRunId = + LongConverter.invertLong(Bytes.toLong(rowKeyComponents[3])); + String appId = appIDKeyConverter.decode(rowKeyComponents[4]); + return new ApplicationRowKey(clusterId, userId, flowName, flowRunId, + appId); + } + } + +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKeyPrefix.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKeyPrefix.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKeyPrefix.java new file mode 100644 index 0000000..f61b0e9 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationRowKeyPrefix.java @@ -0,0 +1,69 @@ +/** + * 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.yarn.server.timelineservice.storage.application; + +import org.apache.hadoop.yarn.server.timelineservice.storage.common.RowKeyPrefix; + +/** + * Represents a partial rowkey (without flowName or without flowName and + * flowRunId) for the application table. + */ +public class ApplicationRowKeyPrefix extends ApplicationRowKey implements + RowKeyPrefix<ApplicationRowKey> { + + /** + * Creates a prefix which generates the following rowKeyPrefixes for the + * application table: {@code clusterId!userName!flowName!}. + * + * @param clusterId the cluster on which applications ran + * @param userId the user that ran applications + * @param flowName the name of the flow that was run by the user on the + * cluster + */ + public ApplicationRowKeyPrefix(String clusterId, String userId, + String flowName) { + super(clusterId, userId, flowName, null, null); + } + + /** + * Creates a prefix which generates the following rowKeyPrefixes for the + * application table: {@code clusterId!userName!flowName!flowRunId!}. + * + * @param clusterId identifying the cluster + * @param userId identifying the user + * @param flowName identifying the flow + * @param flowRunId identifying the instance of this flow + */ + public ApplicationRowKeyPrefix(String clusterId, String userId, + String flowName, Long flowRunId) { + super(clusterId, userId, flowName, flowRunId, null); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.application. + * RowKeyPrefix#getRowKeyPrefix() + */ + @Override + public byte[] getRowKeyPrefix() { + return super.getRowKey(); + } + +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationTable.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationTable.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationTable.java new file mode 100644 index 0000000..a02f768 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/ApplicationTable.java @@ -0,0 +1,161 @@ +/** + * 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.yarn.server.timelineservice.storage.application; + +import java.io.IOException; + +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HColumnDescriptor; +import org.apache.hadoop.hbase.HTableDescriptor; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.Admin; +import org.apache.hadoop.hbase.regionserver.BloomType; +import org.apache.hadoop.yarn.conf.YarnConfiguration; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.BaseTable; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.TimelineHBaseSchemaConstants; + +/** + * The application table as column families info, config and metrics. Info + * stores information about a YARN application entity, config stores + * configuration data of a YARN application, metrics stores the metrics of a + * YARN application. This table is entirely analogous to the entity table but + * created for better performance. + * + * Example application table record: + * + * <pre> + * |-------------------------------------------------------------------------| + * | Row | Column Family | Column Family| Column Family| + * | key | info | metrics | config | + * |-------------------------------------------------------------------------| + * | clusterId! | id:appId | metricId1: | configKey1: | + * | userName! | | metricValue1 | configValue1 | + * | flowName! | created_time: | @timestamp1 | | + * | flowRunId! | 1392993084018 | | configKey2: | + * | AppId | | metriciD1: | configValue2 | + * | | i!infoKey: | metricValue2 | | + * | | infoValue | @timestamp2 | | + * | | | | | + * | | r!relatesToKey: | metricId2: | | + * | | id3=id4=id5 | metricValue1 | | + * | | | @timestamp2 | | + * | | s!isRelatedToKey: | | | + * | | id7=id9=id6 | | | + * | | | | | + * | | e!eventId=timestamp=infoKey: | | | + * | | eventInfoValue | | | + * | | | | | + * | | flowVersion: | | | + * | | versionValue | | | + * |-------------------------------------------------------------------------| + * </pre> + */ +public class ApplicationTable extends BaseTable<ApplicationTable> { + /** application prefix. */ + private static final String PREFIX = + YarnConfiguration.TIMELINE_SERVICE_PREFIX + ".application"; + + /** config param name that specifies the application table name. */ + public static final String TABLE_NAME_CONF_NAME = PREFIX + ".table.name"; + + /** + * config param name that specifies the TTL for metrics column family in + * application table. + */ + private static final String METRICS_TTL_CONF_NAME = PREFIX + + ".table.metrics.ttl"; + + /** default value for application table name. */ + private static final String DEFAULT_TABLE_NAME = + "timelineservice.application"; + + /** default TTL is 30 days for metrics timeseries. */ + private static final int DEFAULT_METRICS_TTL = 2592000; + + /** default max number of versions. */ + private static final int DEFAULT_METRICS_MAX_VERSIONS = 1000; + + private static final Log LOG = LogFactory.getLog(ApplicationTable.class); + + public ApplicationTable() { + super(TABLE_NAME_CONF_NAME, DEFAULT_TABLE_NAME); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.BaseTable#createTable + * (org.apache.hadoop.hbase.client.Admin, + * org.apache.hadoop.conf.Configuration) + */ + public void createTable(Admin admin, Configuration hbaseConf) + throws IOException { + + TableName table = getTableName(hbaseConf); + if (admin.tableExists(table)) { + // do not disable / delete existing table + // similar to the approach taken by map-reduce jobs when + // output directory exists + throw new IOException("Table " + table.getNameAsString() + + " already exists."); + } + + HTableDescriptor applicationTableDescp = new HTableDescriptor(table); + HColumnDescriptor infoCF = + new HColumnDescriptor(ApplicationColumnFamily.INFO.getBytes()); + infoCF.setBloomFilterType(BloomType.ROWCOL); + applicationTableDescp.addFamily(infoCF); + + HColumnDescriptor configCF = + new HColumnDescriptor(ApplicationColumnFamily.CONFIGS.getBytes()); + configCF.setBloomFilterType(BloomType.ROWCOL); + configCF.setBlockCacheEnabled(true); + applicationTableDescp.addFamily(configCF); + + HColumnDescriptor metricsCF = + new HColumnDescriptor(ApplicationColumnFamily.METRICS.getBytes()); + applicationTableDescp.addFamily(metricsCF); + metricsCF.setBlockCacheEnabled(true); + // always keep 1 version (the latest) + metricsCF.setMinVersions(1); + metricsCF.setMaxVersions(DEFAULT_METRICS_MAX_VERSIONS); + metricsCF.setTimeToLive(hbaseConf.getInt(METRICS_TTL_CONF_NAME, + DEFAULT_METRICS_TTL)); + applicationTableDescp.setRegionSplitPolicyClassName( + "org.apache.hadoop.hbase.regionserver.KeyPrefixRegionSplitPolicy"); + applicationTableDescp.setValue("KeyPrefixRegionSplitPolicy.prefix_length", + TimelineHBaseSchemaConstants.USERNAME_SPLIT_KEY_PREFIX_LENGTH); + admin.createTable(applicationTableDescp, + TimelineHBaseSchemaConstants.getUsernameSplits()); + LOG.info("Status of table creation for " + table.getNameAsString() + "=" + + admin.tableExists(table)); + } + + /** + * @param metricsTTL time to live parameter for the metrics in this table. + * @param hbaseConf configuration in which to set the metrics TTL config + * variable. + */ + public void setMetricsTTL(int metricsTTL, Configuration hbaseConf) { + hbaseConf.setInt(METRICS_TTL_CONF_NAME, metricsTTL); + } + +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/package-info.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/package-info.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/package-info.java new file mode 100644 index 0000000..03f508f --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/application/package-info.java @@ -0,0 +1,28 @@ +/* + * 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.yarn.server.timelineservice.storage.application + * contains classes related to implementation for application table. + */ +@InterfaceAudience.Private +@InterfaceStability.Unstable +package org.apache.hadoop.yarn.server.timelineservice.storage.application; + +import org.apache.hadoop.classification.InterfaceAudience; +import org.apache.hadoop.classification.InterfaceStability; http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumn.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumn.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumn.java new file mode 100644 index 0000000..ff61633 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumn.java @@ -0,0 +1,148 @@ +/** + * 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.yarn.server.timelineservice.storage.apptoflow; + + +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.Column; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnFamily; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.Separator; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.TypedBufferedMutator; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ValueConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.flow.Attribute; + +import java.io.IOException; + +/** + * Identifies fully qualified columns for the {@link AppToFlowTable}. + */ +public enum AppToFlowColumn implements Column<AppToFlowTable> { + + /** + * The flow ID. + */ + FLOW_ID(AppToFlowColumnFamily.MAPPING, "flow_id"), + + /** + * The flow run ID. + */ + FLOW_RUN_ID(AppToFlowColumnFamily.MAPPING, "flow_run_id"), + + /** + * The user. + */ + USER_ID(AppToFlowColumnFamily.MAPPING, "user_id"); + + private final ColumnHelper<AppToFlowTable> column; + private final ColumnFamily<AppToFlowTable> columnFamily; + private final String columnQualifier; + private final byte[] columnQualifierBytes; + + AppToFlowColumn(ColumnFamily<AppToFlowTable> columnFamily, + String columnQualifier) { + this.columnFamily = columnFamily; + this.columnQualifier = columnQualifier; + // Future-proof by ensuring the right column prefix hygiene. + this.columnQualifierBytes = + Bytes.toBytes(Separator.SPACE.encode(columnQualifier)); + this.column = new ColumnHelper<AppToFlowTable>(columnFamily); + } + + /** + * @return the column name value + */ + private String getColumnQualifier() { + return columnQualifier; + } + + @Override + public byte[] getColumnQualifierBytes() { + return columnQualifierBytes.clone(); + } + + public void store(byte[] rowKey, + TypedBufferedMutator<AppToFlowTable> tableMutator, Long timestamp, + Object inputValue, Attribute... attributes) throws IOException { + column.store(rowKey, tableMutator, columnQualifierBytes, timestamp, + inputValue, attributes); + } + + @Override + public byte[] getColumnFamilyBytes() { + return columnFamily.getBytes(); + } + + @Override + public ValueConverter getValueConverter() { + return column.getValueConverter(); + } + + public Object readResult(Result result) throws IOException { + return column.readResult(result, columnQualifierBytes); + } + + /** + * Retrieve an {@link AppToFlowColumn} given a name, or null if there is no + * match. The following holds true: {@code columnFor(x) == columnFor(y)} if + * and only if {@code x.equals(y)} or {@code (x == y == null)} + * + * @param columnQualifier Name of the column to retrieve + * @return the corresponding {@link AppToFlowColumn} or null + */ + public static final AppToFlowColumn columnFor(String columnQualifier) { + + // Match column based on value, assume column family matches. + for (AppToFlowColumn ec : AppToFlowColumn.values()) { + // Find a match based only on name. + if (ec.getColumnQualifier().equals(columnQualifier)) { + return ec; + } + } + + // Default to null + return null; + } + + /** + * Retrieve an {@link AppToFlowColumn} given a name, or null if there is no + * match. The following holds true: {@code columnFor(a,x) == columnFor(b,y)} + * if and only if {@code a.equals(b) & x.equals(y)} or + * {@code (x == y == null)} + * + * @param columnFamily The columnFamily for which to retrieve the column. + * @param name Name of the column to retrieve + * @return the corresponding {@link AppToFlowColumn} or null if both arguments + * don't match. + */ + public static final AppToFlowColumn columnFor( + AppToFlowColumnFamily columnFamily, String name) { + + for (AppToFlowColumn ec : AppToFlowColumn.values()) { + // Find a match based column family and on name. + if (ec.columnFamily.equals(columnFamily) + && ec.getColumnQualifier().equals(name)) { + return ec; + } + } + + // Default to null + return null; + } +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumnFamily.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumnFamily.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumnFamily.java new file mode 100644 index 0000000..f3f045e --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowColumnFamily.java @@ -0,0 +1,51 @@ +/** + * 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.yarn.server.timelineservice.storage.apptoflow; + +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnFamily; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.Separator; + +/** + * Represents the app_flow table column families. + */ +public enum AppToFlowColumnFamily implements ColumnFamily<AppToFlowTable> { + /** + * Mapping column family houses known columns such as flowName and flowRunId. + */ + MAPPING("m"); + + /** + * Byte representation of this column family. + */ + private final byte[] bytes; + + /** + * @param value create a column family with this name. Must be lower case and + * without spaces. + */ + AppToFlowColumnFamily(String value) { + // column families should be lower case and not contain any spaces. + this.bytes = Bytes.toBytes(Separator.SPACE.encode(value)); + } + + public byte[] getBytes() { + return Bytes.copy(bytes); + } + +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowRowKey.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowRowKey.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowRowKey.java new file mode 100644 index 0000000..8df4407 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowRowKey.java @@ -0,0 +1,143 @@ +/** + * 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.yarn.server.timelineservice.storage.apptoflow; + +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.AppIdKeyConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.Separator; + +/** + * Represents a rowkey for the app_flow table. + */ +public class AppToFlowRowKey { + private final String clusterId; + private final String appId; + private final KeyConverter<AppToFlowRowKey> appToFlowRowKeyConverter = + new AppToFlowRowKeyConverter(); + + public AppToFlowRowKey(String clusterId, String appId) { + this.clusterId = clusterId; + this.appId = appId; + } + + public String getClusterId() { + return clusterId; + } + + public String getAppId() { + return appId; + } + + /** + * Constructs a row key prefix for the app_flow table as follows: + * {@code clusterId!AppId}. + * + * @return byte array with the row key + */ + public byte[] getRowKey() { + return appToFlowRowKeyConverter.encode(this); + } + + /** + * Given the raw row key as bytes, returns the row key as an object. + * + * @param rowKey a rowkey represented as a byte array. + * @return an <cite>AppToFlowRowKey</cite> object. + */ + public static AppToFlowRowKey parseRowKey(byte[] rowKey) { + return new AppToFlowRowKeyConverter().decode(rowKey); + } + + /** + * Encodes and decodes row key for app_flow table. The row key is of the form + * clusterId!appId. clusterId is a string and appId is encoded/decoded using + * {@link AppIdKeyConverter}. + * <p> + */ + final private static class AppToFlowRowKeyConverter implements + KeyConverter<AppToFlowRowKey> { + + private final KeyConverter<String> appIDKeyConverter = + new AppIdKeyConverter(); + + /** + * Intended for use in AppToFlowRowKey only. + */ + private AppToFlowRowKeyConverter() { + } + + + /** + * App to flow row key is of the form clusterId!appId with the 2 segments + * separated by !. The sizes below indicate sizes of both of these segments + * in sequence. clusterId is a string. appId is represented as 12 bytes w. + * cluster Timestamp part of appid taking 8 bytes(long) and seq id taking 4 + * bytes(int). Strings are variable in size (i.e. end whenever separator is + * encountered). This is used while decoding and helps in determining where + * to split. + */ + private static final int[] SEGMENT_SIZES = {Separator.VARIABLE_SIZE, + Bytes.SIZEOF_LONG + Bytes.SIZEOF_INT }; + + /* + * (non-Javadoc) + * + * Encodes AppToFlowRowKey object into a byte array with each + * component/field in AppToFlowRowKey separated by Separator#QUALIFIERS. + * This leads to an app to flow table row key of the form clusterId!appId + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common + * .KeyConverter#encode(java.lang.Object) + */ + @Override + public byte[] encode(AppToFlowRowKey rowKey) { + byte[] first = + Separator.encode(rowKey.getClusterId(), Separator.SPACE, + Separator.TAB, Separator.QUALIFIERS); + byte[] second = appIDKeyConverter.encode(rowKey.getAppId()); + return Separator.QUALIFIERS.join(first, second); + } + + /* + * (non-Javadoc) + * + * Decodes an app to flow row key of the form clusterId!appId represented + * in byte format and converts it into an AppToFlowRowKey object. + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common + * .KeyConverter#decode(byte[]) + */ + @Override + public AppToFlowRowKey decode(byte[] rowKey) { + byte[][] rowKeyComponents = + Separator.QUALIFIERS.split(rowKey, SEGMENT_SIZES); + if (rowKeyComponents.length != 2) { + throw new IllegalArgumentException("the row key is not valid for " + + "the app-to-flow table"); + } + String clusterId = + Separator.decode(Bytes.toString(rowKeyComponents[0]), + Separator.QUALIFIERS, Separator.TAB, Separator.SPACE); + String appId = appIDKeyConverter.decode(rowKeyComponents[1]); + return new AppToFlowRowKey(clusterId, appId); + } + } +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowTable.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowTable.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowTable.java new file mode 100644 index 0000000..301cf99 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/AppToFlowTable.java @@ -0,0 +1,113 @@ +/** + * 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.yarn.server.timelineservice.storage.apptoflow; + + +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HColumnDescriptor; +import org.apache.hadoop.hbase.HTableDescriptor; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.Admin; +import org.apache.hadoop.hbase.regionserver.BloomType; +import org.apache.hadoop.yarn.conf.YarnConfiguration; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.BaseTable; +import org.apache.hadoop.yarn.server.timelineservice.storage.common.TimelineHBaseSchemaConstants; + +import java.io.IOException; + +/** + * The app_flow table as column families mapping. Mapping stores + * appId to flowName and flowRunId mapping information + * + * Example app_flow table record: + * + * <pre> + * |--------------------------------------| + * | Row | Column Family | + * | key | info | + * |--------------------------------------| + * | clusterId! | flowName: | + * | AppId | foo@daily_hive_report | + * | | | + * | | flowRunId: | + * | | 1452828720457 | + * | | | + * | | user_id: | + * | | admin | + * | | | + * | | | + * | | | + * |--------------------------------------| + * </pre> + */ +public class AppToFlowTable extends BaseTable<AppToFlowTable> { + /** app_flow prefix. */ + private static final String PREFIX = + YarnConfiguration.TIMELINE_SERVICE_PREFIX + "app-flow"; + + /** config param name that specifies the app_flow table name. */ + public static final String TABLE_NAME_CONF_NAME = PREFIX + ".table.name"; + + /** default value for app_flow table name. */ + private static final String DEFAULT_TABLE_NAME = "timelineservice.app_flow"; + + private static final Log LOG = LogFactory.getLog(AppToFlowTable.class); + + public AppToFlowTable() { + super(TABLE_NAME_CONF_NAME, DEFAULT_TABLE_NAME); + } + + /* + * (non-Javadoc) + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.BaseTable#createTable + * (org.apache.hadoop.hbase.client.Admin, + * org.apache.hadoop.conf.Configuration) + */ + public void createTable(Admin admin, Configuration hbaseConf) + throws IOException { + + TableName table = getTableName(hbaseConf); + if (admin.tableExists(table)) { + // do not disable / delete existing table + // similar to the approach taken by map-reduce jobs when + // output directory exists + throw new IOException("Table " + table.getNameAsString() + + " already exists."); + } + + HTableDescriptor appToFlowTableDescp = new HTableDescriptor(table); + HColumnDescriptor mappCF = + new HColumnDescriptor(AppToFlowColumnFamily.MAPPING.getBytes()); + mappCF.setBloomFilterType(BloomType.ROWCOL); + appToFlowTableDescp.addFamily(mappCF); + + appToFlowTableDescp + .setRegionSplitPolicyClassName( + "org.apache.hadoop.hbase.regionserver.KeyPrefixRegionSplitPolicy"); + appToFlowTableDescp.setValue("KeyPrefixRegionSplitPolicy.prefix_length", + TimelineHBaseSchemaConstants.USERNAME_SPLIT_KEY_PREFIX_LENGTH); + admin.createTable(appToFlowTableDescp, + TimelineHBaseSchemaConstants.getUsernameSplits()); + LOG.info("Status of table creation for " + table.getNameAsString() + "=" + + admin.tableExists(table)); + } +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/package-info.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/package-info.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/package-info.java new file mode 100644 index 0000000..f01d982 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/apptoflow/package-info.java @@ -0,0 +1,28 @@ +/* + * 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.yarn.server.timelineservice.storage.apptoflow + * contains classes related to implementation for app to flow table. + */ +@InterfaceAudience.Private +@InterfaceStability.Unstable +package org.apache.hadoop.yarn.server.timelineservice.storage.apptoflow; + +import org.apache.hadoop.classification.InterfaceAudience; +import org.apache.hadoop.classification.InterfaceStability; \ No newline at end of file http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/AppIdKeyConverter.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/AppIdKeyConverter.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/AppIdKeyConverter.java new file mode 100644 index 0000000..c165801 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/AppIdKeyConverter.java @@ -0,0 +1,96 @@ +/** + * 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.yarn.server.timelineservice.storage.common; + +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.yarn.api.records.ApplicationId; + +/** + * Encodes and decodes {@link ApplicationId} for row keys. + * App ID is stored in row key as 12 bytes, cluster timestamp section of app id + * (long - 8 bytes) followed by sequence id section of app id (int - 4 bytes). + */ +public final class AppIdKeyConverter implements KeyConverter<String> { + + public AppIdKeyConverter() { + } + + /* + * (non-Javadoc) + * + * Converts/encodes a string app Id into a byte representation for (row) keys. + * For conversion, we extract cluster timestamp and sequence id from the + * string app id (calls ConverterUtils#toApplicationId(String) for + * conversion) and then store it in a byte array of length 12 (8 bytes (long) + * for cluster timestamp followed 4 bytes(int) for sequence id). Both cluster + * timestamp and sequence id are inverted so that the most recent cluster + * timestamp and highest sequence id appears first in the table (i.e. + * application id appears in a descending order). + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter + * #encode(java.lang.Object) + */ + @Override + public byte[] encode(String appIdStr) { + ApplicationId appId = ApplicationId.fromString(appIdStr); + byte[] appIdBytes = new byte[getKeySize()]; + byte[] clusterTs = Bytes.toBytes( + LongConverter.invertLong(appId.getClusterTimestamp())); + System.arraycopy(clusterTs, 0, appIdBytes, 0, Bytes.SIZEOF_LONG); + byte[] seqId = Bytes.toBytes( + HBaseTimelineStorageUtils.invertInt(appId.getId())); + System.arraycopy(seqId, 0, appIdBytes, Bytes.SIZEOF_LONG, Bytes.SIZEOF_INT); + return appIdBytes; + } + + /* + * (non-Javadoc) + * + * Converts/decodes a 12 byte representation of app id for (row) keys to an + * app id in string format which can be returned back to client. + * For decoding, 12 bytes are interpreted as 8 bytes of inverted cluster + * timestamp(long) followed by 4 bytes of inverted sequence id(int). Calls + * ApplicationId#toString to generate string representation of app id. + * + * @see + * org.apache.hadoop.yarn.server.timelineservice.storage.common.KeyConverter + * #decode(byte[]) + */ + @Override + public String decode(byte[] appIdBytes) { + if (appIdBytes.length != getKeySize()) { + throw new IllegalArgumentException("Invalid app id in byte format"); + } + long clusterTs = LongConverter.invertLong( + Bytes.toLong(appIdBytes, 0, Bytes.SIZEOF_LONG)); + int seqId = HBaseTimelineStorageUtils.invertInt( + Bytes.toInt(appIdBytes, Bytes.SIZEOF_LONG, Bytes.SIZEOF_INT)); + return ApplicationId.newInstance(clusterTs, seqId).toString(); + } + + /** + * Returns the size of app id after encoding. + * + * @return size of app id after encoding. + */ + public static int getKeySize() { + return Bytes.SIZEOF_LONG + Bytes.SIZEOF_INT; + } +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BaseTable.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BaseTable.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BaseTable.java new file mode 100644 index 0000000..8581aa4 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BaseTable.java @@ -0,0 +1,140 @@ +/** + * 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.yarn.server.timelineservice.storage.common; + +import java.io.IOException; + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.Admin; +import org.apache.hadoop.hbase.client.BufferedMutator; +import org.apache.hadoop.hbase.client.Connection; +import org.apache.hadoop.hbase.client.Get; +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.client.ResultScanner; +import org.apache.hadoop.hbase.client.Scan; +import org.apache.hadoop.hbase.client.Table; + +/** + * Implements behavior common to tables used in the timeline service storage. It + * is thread-safe, and can be used by multiple threads concurrently. + * + * @param <T> reference to the table instance class itself for type safety. + */ +public abstract class BaseTable<T> { + + /** + * Name of config variable that is used to point to this table. + */ + private final String tableNameConfName; + + /** + * Unless the configuration overrides, this will be the default name for the + * table when it is created. + */ + private final String defaultTableName; + + /** + * @param tableNameConfName name of config variable that is used to point to + * this table. + * @param defaultTableName Default table name if table from config is not + * found. + */ + protected BaseTable(String tableNameConfName, String defaultTableName) { + this.tableNameConfName = tableNameConfName; + this.defaultTableName = defaultTableName; + } + + /** + * Used to create a type-safe mutator for this table. + * + * @param hbaseConf used to read table name. + * @param conn used to create a table from. + * @return a type safe {@link BufferedMutator} for the entity table. + * @throws IOException if any exception occurs while creating mutator for the + * table. + */ + public TypedBufferedMutator<T> getTableMutator(Configuration hbaseConf, + Connection conn) throws IOException { + + TableName tableName = this.getTableName(hbaseConf); + + // Plain buffered mutator + BufferedMutator bufferedMutator = conn.getBufferedMutator(tableName); + + // Now make this thing type safe. + // This is how service initialization should hang on to this variable, with + // the proper type + TypedBufferedMutator<T> table = + new BufferedMutatorDelegator<T>(bufferedMutator); + + return table; + } + + /** + * @param hbaseConf used to read settings that override defaults + * @param conn used to create table from + * @param scan that specifies what you want to read from this table. + * @return scanner for the table. + * @throws IOException if any exception occurs while getting the scanner. + */ + public ResultScanner getResultScanner(Configuration hbaseConf, + Connection conn, Scan scan) throws IOException { + Table table = conn.getTable(getTableName(hbaseConf)); + return table.getScanner(scan); + } + + /** + * + * @param hbaseConf used to read settings that override defaults + * @param conn used to create table from + * @param get that specifies what single row you want to get from this table + * @return result of get operation + * @throws IOException if any exception occurs while getting the result. + */ + public Result getResult(Configuration hbaseConf, Connection conn, Get get) + throws IOException { + Table table = conn.getTable(getTableName(hbaseConf)); + return table.get(get); + } + + /** + * Get the table name for this table. + * + * @param hbaseConf HBase configuration from which table name will be fetched. + * @return A {@link TableName} object. + */ + public TableName getTableName(Configuration hbaseConf) { + TableName table = + TableName.valueOf(hbaseConf.get(tableNameConfName, defaultTableName)); + return table; + + } + + /** + * Used to create the table in HBase. Should be called only once (per HBase + * instance). + * + * @param admin Used for doing HBase table operations. + * @param hbaseConf Hbase configuration. + * @throws IOException if any exception occurs while creating the table. + */ + public abstract void createTable(Admin admin, Configuration hbaseConf) + throws IOException; + +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BufferedMutatorDelegator.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BufferedMutatorDelegator.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BufferedMutatorDelegator.java new file mode 100644 index 0000000..cf469a5 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/BufferedMutatorDelegator.java @@ -0,0 +1,73 @@ +/** + * 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.yarn.server.timelineservice.storage.common; + +import java.io.IOException; +import java.util.List; + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.BufferedMutator; +import org.apache.hadoop.hbase.client.Mutation; + +/** + * To be used to wrap an actual {@link BufferedMutator} in a type safe manner. + * + * @param <T> The class referring to the table to be written to. + */ +class BufferedMutatorDelegator<T> implements TypedBufferedMutator<T> { + + private final BufferedMutator bufferedMutator; + + /** + * @param bufferedMutator the mutator to be wrapped for delegation. Shall not + * be null. + */ + public BufferedMutatorDelegator(BufferedMutator bufferedMutator) { + this.bufferedMutator = bufferedMutator; + } + + public TableName getName() { + return bufferedMutator.getName(); + } + + public Configuration getConfiguration() { + return bufferedMutator.getConfiguration(); + } + + public void mutate(Mutation mutation) throws IOException { + bufferedMutator.mutate(mutation); + } + + public void mutate(List<? extends Mutation> mutations) throws IOException { + bufferedMutator.mutate(mutations); + } + + public void close() throws IOException { + bufferedMutator.close(); + } + + public void flush() throws IOException { + bufferedMutator.flush(); + } + + public long getWriteBufferSize() { + return bufferedMutator.getWriteBufferSize(); + } + +} http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/Column.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/Column.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/Column.java new file mode 100644 index 0000000..90f2de4 --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/Column.java @@ -0,0 +1,80 @@ +/** + * 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.yarn.server.timelineservice.storage.common; + +import java.io.IOException; + +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.yarn.server.timelineservice.storage.flow.Attribute; + +/** + * A Column represents the way to store a fully qualified column in a specific + * table. + */ +public interface Column<T> { + + /** + * Sends a Mutation to the table. The mutations will be buffered and sent over + * the wire as part of a batch. + * + * @param rowKey identifying the row to write. Nothing gets written when null. + * @param tableMutator used to modify the underlying HBase table. Caller is + * responsible to pass a mutator for the table that actually has this + * column. + * @param timestamp version timestamp. When null the server timestamp will be + * used. + * @param attributes Map of attributes for this mutation. used in the + * coprocessor to set/read the cell tags. Can be null. + * @param inputValue the value to write to the rowKey and column qualifier. + * Nothing gets written when null. + * @throws IOException if there is any exception encountered during store. + */ + void store(byte[] rowKey, TypedBufferedMutator<T> tableMutator, + Long timestamp, Object inputValue, Attribute... attributes) + throws IOException; + + /** + * Get the latest version of this specified column. Note: this call clones the + * value content of the hosting {@link org.apache.hadoop.hbase.Cell Cell}. + * + * @param result Cannot be null + * @return result object (can be cast to whatever object was written to), or + * null when result doesn't contain this column. + * @throws IOException if there is any exception encountered while reading + * result. + */ + Object readResult(Result result) throws IOException; + + /** + * Returns column family name(as bytes) associated with this column. + * @return a byte array encoding column family for this column qualifier. + */ + byte[] getColumnFamilyBytes(); + + /** + * Get byte representation for this column qualifier. + * @return a byte array representing column qualifier. + */ + byte[] getColumnQualifierBytes(); + + /** + * Returns value converter implementation associated with this column. + * @return a {@link ValueConverter} implementation. + */ + ValueConverter getValueConverter(); +} \ No newline at end of file http://git-wip-us.apache.org/repos/asf/hadoop/blob/b01514f6/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/ColumnFamily.java ---------------------------------------------------------------------- diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/ColumnFamily.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/ColumnFamily.java new file mode 100644 index 0000000..452adcd --- /dev/null +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/ColumnFamily.java @@ -0,0 +1,34 @@ +/** + * 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.yarn.server.timelineservice.storage.common; + +/** + * Type safe column family. + * + * @param <T> refers to the table for which this column family is used for. + */ +public interface ColumnFamily<T> { + + /** + * Keep a local copy if you need to avoid overhead of repeated cloning. + * + * @return a clone of the byte representation of the column family. + */ + byte[] getBytes(); + +} \ No newline at end of file --------------------------------------------------------------------- To unsubscribe, e-mail: common-commits-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-commits-h...@hadoop.apache.org
