Add inline firehose #8056
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,99 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.druid.segment.realtime.firehose; | ||
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| import org.apache.commons.io.IOUtils; | ||
| import org.apache.commons.io.LineIterator; | ||
| import org.apache.druid.data.input.Firehose; | ||
| import org.apache.druid.data.input.InputRow; | ||
| import org.apache.druid.data.input.InputRowPlusRaw; | ||
| import org.apache.druid.data.input.impl.StringInputRowParser; | ||
| import org.apache.druid.java.util.common.StringUtils; | ||
| import org.apache.druid.java.util.common.parsers.ParseException; | ||
| import org.apache.druid.utils.Runnables; | ||
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| import java.io.ByteArrayInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.nio.charset.Charset; | ||
| import java.util.NoSuchElementException; | ||
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||
| /** | ||
| * Firehose that produces data from its own spec | ||
| */ | ||
| public class InlineFirehose implements Firehose | ||
| { | ||
| private final StringInputRowParser parser; | ||
| private final LineIterator lineIterator; | ||
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| InlineFirehose(String data, StringInputRowParser parser) throws IOException | ||
| { | ||
| this.parser = parser; | ||
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| Charset charset = Charset.forName(parser.getEncoding()); | ||
| InputStream stream = new ByteArrayInputStream(data.getBytes(charset)); | ||
| lineIterator = IOUtils.lineIterator(stream, charset); | ||
| } | ||
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| @Override | ||
| public boolean hasMore() | ||
| { | ||
| return lineIterator.hasNext(); | ||
| } | ||
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| @Override | ||
| public InputRow nextRow() | ||
| { | ||
| return parser.parse(nextRaw()); | ||
| } | ||
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| private String nextRaw() | ||
| { | ||
| if (!hasMore()) { | ||
| throw new NoSuchElementException(); | ||
| } | ||
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| return lineIterator.next(); | ||
| } | ||
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| @Override | ||
| public InputRowPlusRaw nextRowWithRaw() | ||
| { | ||
| String raw = nextRaw(); | ||
| try { | ||
| return InputRowPlusRaw.of(parser.parse(raw), StringUtils.toUtf8(raw)); | ||
| } | ||
| catch (ParseException e) { | ||
| return InputRowPlusRaw.of(StringUtils.toUtf8(raw), e); | ||
| } | ||
| } | ||
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| @Override | ||
| public Runnable commit() | ||
| { | ||
| return Runnables.getNoopRunnable(); | ||
| } | ||
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| @Override | ||
| public void close() throws IOException | ||
| { | ||
| lineIterator.close(); | ||
| } | ||
| } |
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nit: i know you didn't write this, but maybe it should be "an RDBMS."?