| /* |
| * 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.io.IOException; |
| import java.util.Iterator; |
| import java.util.Map.Entry; |
| |
| import javax.annotation.Nullable; |
| |
| import org.apache.drill.exec.ops.ExecutorFragmentContext; |
| import org.apache.drill.exec.proto.UserBitShared; |
| import org.apache.drill.exec.proto.UserBitShared.QueryProfile; |
| import org.apache.drill.exec.serialization.InstanceSerializer; |
| import org.apache.drill.exec.store.pojo.NonNullable; |
| |
| import org.apache.drill.shaded.guava.com.google.common.base.Function; |
| import org.apache.drill.shaded.guava.com.google.common.collect.Iterators; |
| |
| /** |
| * System table listing completed profiles as JSON documents |
| */ |
| public class ProfileJsonIterator extends ProfileIterator { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ProfileJsonIterator.class); |
| |
| private final InstanceSerializer<QueryProfile> profileSerializer; |
| private final Iterator<ProfileJson> itr; |
| |
| public ProfileJsonIterator(ExecutorFragmentContext context, int maxRecords) { |
| super(context, maxRecords); |
| //Holding a serializer (for JSON extract) |
| this.profileSerializer = profileStoreContext.getProfileStoreConfig().getSerializer(); |
| this.itr = iterateProfileInfoJson(); |
| } |
| |
| @Override |
| protected Iterator<Entry<String, QueryProfile>> getProfiles(int skip, int take) { |
| return profileStoreContext.getCompletedProfileStore().getRange(skip, take); |
| } |
| |
| //Returns an iterator for authorized profiles |
| private Iterator<ProfileJson> iterateProfileInfoJson() { |
| try { |
| //Transform authorized profiles to iterator for ProfileInfoJson |
| return transformJson(getAuthorizedProfiles(queryingUsername, isAdmin)); |
| |
| } catch (Exception e) { |
| logger.debug(e.getMessage(), e); |
| return Iterators.singletonIterator(ProfileJson.getDefault()); |
| } |
| } |
| |
| /** |
| * Iterating persistentStore as a iterator of {@link org.apache.drill.exec.store.sys.ProfileJsonIterator.ProfileJson}. |
| */ |
| private Iterator<ProfileJson> transformJson(Iterator<Entry<String, UserBitShared.QueryProfile>> all) { |
| return Iterators.transform(all, new Function<Entry<String, UserBitShared.QueryProfile>, ProfileJson>() { |
| @Nullable |
| @Override |
| public ProfileJson apply(@Nullable Entry<String, UserBitShared.QueryProfile> input) { |
| if (input == null || input.getValue() == null) { |
| return ProfileJson.getDefault(); |
| } |
| |
| //Constructing ProfileInfo |
| final String queryID = input.getKey(); |
| String profileJson; |
| try { |
| profileJson = new String(profileSerializer.serialize(input.getValue())); |
| } catch (IOException e) { |
| logger.debug("Failed to serialize profile for: " + queryID, e); |
| profileJson = "{ 'message' : 'error (unable to serialize profile: "+ queryID +")' }"; |
| } |
| |
| return new ProfileJson( |
| queryID, |
| profileJson |
| ); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return itr.hasNext(); |
| } |
| |
| @Override |
| public Object next() { |
| return itr.next(); |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public static class ProfileJson { |
| private static final String UNKNOWN_VALUE = "N/A"; |
| |
| private static final ProfileJson DEFAULT = new ProfileJson(); |
| |
| @NonNullable |
| public final String queryId; |
| public final String json; |
| |
| public ProfileJson(String query_id, String profileJson) { |
| this.queryId = query_id; |
| this.json = profileJson; |
| } |
| |
| private ProfileJson() { |
| this(UNKNOWN_VALUE, UNKNOWN_VALUE); |
| } |
| |
| /** |
| * If unable to get ProfileInfo, use this default instance instead. |
| * @return the default instance |
| */ |
| public static ProfileJson getDefault() { |
| return DEFAULT; |
| } |
| } |
| } |