| /* |
| * 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.drill.exec.store.sys; |
| |
| import java.util.Iterator; |
| |
| import org.apache.drill.exec.ops.ExecutorFragmentContext; |
| import org.apache.drill.exec.store.sys.OptionIterator.OptionValueWrapper; |
| |
| /** |
| * An enumeration of all tables in Drill's system ("sys") schema. |
| * <p> |
| * OPTION, DRILLBITS and VERSION are local tables available on every Drillbit. |
| * MEMORY and THREADS are distributed tables with one record on every Drillbit. |
| * PROFILES and PROFILES_JSON are stored in local / distributed storage. |
| * </p> |
| */ |
| public enum SystemTable { |
| OPTIONS_OLD("options_old", false, OptionValueWrapper.class) { |
| @Deprecated |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new OptionIterator(context, OptionIterator.Mode.SYS_SESS_PUBLIC); |
| } |
| }, |
| |
| OPTIONS("options", false, ExtendedOptionIterator.ExtendedOptionValueWrapper.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new ExtendedOptionIterator(context, false); |
| } |
| }, |
| |
| INTERNAL_OPTIONS_OLD("internal_options_old", false, OptionValueWrapper.class) { |
| @Deprecated |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new OptionIterator(context, OptionIterator.Mode.SYS_SESS_INTERNAL); |
| } |
| }, |
| |
| INTERNAL_OPTIONS("internal_options", false, ExtendedOptionIterator.ExtendedOptionValueWrapper.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new ExtendedOptionIterator(context, true); |
| } |
| }, |
| |
| BOOT("boot", false, OptionValueWrapper.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new OptionIterator(context, OptionIterator.Mode.BOOT); |
| } |
| }, |
| |
| DRILLBITS("drillbits", false,DrillbitIterator.DrillbitInstance.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new DrillbitIterator(context); |
| } |
| }, |
| |
| VERSION("version", false, VersionIterator.VersionInfo.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new VersionIterator(); |
| } |
| }, |
| |
| MEMORY("memory", true, MemoryIterator.MemoryInfo.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new MemoryIterator(context); |
| } |
| }, |
| |
| CONNECTIONS("connections", true, BitToUserConnectionIterator.ConnectionInfo.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new BitToUserConnectionIterator(context); |
| } |
| }, |
| |
| PROFILES("profiles", false, ProfileInfoIterator.ProfileInfo.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new ProfileInfoIterator(context, maxRecords); |
| } |
| }, |
| |
| PROFILES_JSON("profiles_json", false, ProfileJsonIterator.ProfileJson.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new ProfileJsonIterator(context, maxRecords); |
| } |
| }, |
| |
| THREADS("threads", true, ThreadsIterator.ThreadsInfo.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new ThreadsIterator(context); |
| } |
| }, |
| |
| FUNCTIONS("functions", false, FunctionsIterator.FunctionInfo.class) { |
| @Override |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| return new FunctionsIterator(context); |
| } |
| }; |
| |
| private final String tableName; |
| private final boolean distributed; |
| private final Class<?> pojoClass; |
| |
| SystemTable(final String tableName, final boolean distributed, final Class<?> pojoClass) { |
| this.tableName = tableName; |
| this.distributed = distributed; |
| this.pojoClass = pojoClass; |
| } |
| |
| public Iterator<Object> getIterator(final ExecutorFragmentContext context, final int maxRecords) { |
| throw new UnsupportedOperationException(tableName + " must override this method."); |
| } |
| |
| public String getTableName() { |
| return tableName; |
| } |
| |
| public boolean isDistributed() { |
| return distributed; |
| } |
| |
| public Class<?> getPojoClass() { |
| return pojoClass; |
| } |
| } |