| /* |
| * 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.test; |
| |
| import org.apache.drill.exec.memory.BufferAllocator; |
| import org.apache.drill.exec.proto.UserBitShared.QueryId; |
| import org.apache.drill.exec.proto.UserBitShared.QueryResult.QueryState; |
| import org.apache.drill.exec.record.RecordBatchLoader; |
| import org.apache.drill.test.BufferingQueryEventListener.QueryEvent; |
| import org.apache.drill.exec.physical.rowSet.DirectRowSet; |
| import org.apache.drill.exec.physical.rowSet.RowSet; |
| |
| /** |
| * Returns query results as an iterator over row sets. Provides |
| * a very easy way for tests to work with query data using the |
| * row set tools. |
| */ |
| |
| public class QueryResultSet { |
| private final BufferingQueryEventListener listener; |
| private boolean eof; |
| private int recordCount = 0; |
| private int batchCount = 0; |
| private QueryId queryId = null; |
| @SuppressWarnings("unused") |
| private QueryState state = null; |
| final RecordBatchLoader loader; |
| |
| public QueryResultSet(BufferingQueryEventListener listener, BufferAllocator allocator) { |
| this.listener = listener; |
| loader = new RecordBatchLoader(allocator); |
| } |
| |
| /** |
| * Return the next batch of data as a row set. The first batch is usually |
| * empty as it carries only schema. |
| * |
| * @return the next batch as a row set, or null if EOF |
| * @throws Exception on a server error |
| */ |
| |
| public DirectRowSet next() throws Exception { |
| if (eof) { |
| return null; |
| } |
| while (true) { |
| QueryEvent event = listener.get(); |
| switch (event.type) |
| { |
| case BATCH: |
| batchCount++; |
| recordCount += event.batch.getHeader().getRowCount(); |
| loader.load(event.batch.getHeader().getDef(), event.batch.getData()); |
| event.batch.release(); |
| return DirectRowSet.fromVectorAccessible(loader.allocator(), loader); |
| |
| case EOF: |
| state = event.state; |
| eof = true; |
| return null; |
| |
| case ERROR: |
| state = event.state; |
| eof = true; |
| throw event.error; |
| |
| case QUERY_ID: |
| queryId = event.queryId; |
| continue; |
| |
| default: |
| throw new IllegalStateException("Unexpected event: " + event.type); |
| } |
| } |
| } |
| |
| public QueryId queryId() { return queryId; } |
| public int recordCount() { return recordCount; } |
| public int batchCount() { return batchCount; } |
| |
| public void close() { |
| try { |
| while (! eof) { |
| RowSet rowSet = next(); |
| if (rowSet != null) { |
| rowSet.clear(); |
| } |
| } |
| } catch (Exception e) { |
| throw new IllegalStateException(e); |
| } finally { |
| loader.clear(); |
| } |
| } |
| } |