org.appenders.log4j2.elasticsearch.jest.BufferedBulk Maven / Gradle / Ivy
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package org.appenders.log4j2.elasticsearch.jest;
/*-
* #%L
* log4j2-elasticsearch
* %%
* Copyright (C) 2018 Rafal Foltynski
* %%
* Licensed 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.
* #L%
*/
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import io.netty.buffer.ByteBuf;
import org.appenders.log4j2.elasticsearch.thirdparty.ReusableByteBufOutputStream;
import io.searchbox.action.BulkableAction;
import io.searchbox.core.Bulk;
import org.appenders.log4j2.elasticsearch.ItemSource;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Collection;
import java.util.concurrent.ConcurrentLinkedQueue;
/**
* Extended Jest {@code io.searchbox.core.Bulk} using {@link org.appenders.log4j2.elasticsearch.BufferedItemSource}
*/
public class BufferedBulk extends Bulk {
public static final char LINE_SEPARATOR = '\n';
private final ObjectWriter objectWriter;
private final ObjectReader objectReader;
private final ItemSource bulkSource;
protected final Collection actions;
public BufferedBulk(BufferedBulk.Builder builder) {
super(builder);
this.actions = builder.actions;
this.objectWriter = builder.objectWriter;
this.objectReader = builder.objectReader;
this.bulkSource = builder.bufferedSource;
}
public BufferedBulkResult deserializeResponse(InputStream responseBody) throws IOException {
return objectReader.readValue(responseBody);
}
/**
* Serializes and writes {@link #actions} into {@link #bulkSource}
*
* @return underlying buffer filled with serialized actions
* @throws IOException if serialization failed
*/
public ByteBuf serializeRequest() throws IOException {
ReusableByteBufOutputStream byteBufOutputStream = new ReusableByteBufOutputStream(bulkSource.getSource());
// in current impl with no IDs, it's possible to reduce serialization by reusing first action
BulkableAction sameAction = getSameItem(actions);
byte[] actionTemplate = sameAction != null ? objectWriter.writeValueAsBytes(sameAction) : null;
for (BulkableAction action : actions) {
if (actionTemplate == null) {
objectWriter.writeValue((OutputStream) byteBufOutputStream, action);
} else {
byteBufOutputStream.write(actionTemplate);
}
byteBufOutputStream.writeByte(LINE_SEPARATOR);
ByteBuf source = ((BufferedIndex)action).getSource().getSource();
bulkSource.getSource().writeBytes(source);
byteBufOutputStream.writeByte(LINE_SEPARATOR);
}
return bulkSource.getSource();
}
public String getURI() {
return "/_bulk";
}
/**
* Checks if all actions in given collection are equal
* ({@link BulkableAction#getIndex()} and {@link BulkableAction#getType()} are the same for all elements)
*
* @param bulkableActions collection of actions to be checked
* @return {@link BulkableAction} first action in given collection if all actions are equal, null otherwise
*/
private BulkableAction getSameItem(Collection bulkableActions) {
BulkableAction current = null;
for (BulkableAction bulkableAction : bulkableActions) {
if (current == null) {
current = bulkableAction;
continue;
}
// fail fast and serialize each item
// no need to check type for org.appenders.log4j2.elasticsearch.jest.BufferedIndex
if (!current.getIndex().equals(bulkableAction.getIndex())) {
return null;
}
}
return current;
}
/**
* Clears underlying collection of actions and releases all {@link ItemSource} instances.
* MUST be called when request is completed. Otherwise it may lead to excessive resource usage and memory leaks
*/
public void completed() {
for (BulkableAction bulkableAction : actions) {
((BufferedIndex)bulkableAction).release();
}
actions.clear();
bulkSource.release();
}
public Collection getActions() {
return actions;
}
public static class Builder extends Bulk.Builder {
protected final Collection actions = new ConcurrentLinkedQueue<>();
private ItemSource bufferedSource;
private ObjectWriter objectWriter;
private ObjectReader objectReader;
@Override
public Bulk.Builder addAction(BulkableAction action) {
this.actions.add(action);
return this;
}
@Override
public Bulk.Builder addAction(Collection actions) {
this.actions.addAll(actions);
return this;
}
@Override
public BufferedBulk build() {
if (bufferedSource == null) {
throw new IllegalArgumentException("bufferedSource cannot be null");
}
if (objectReader == null) {
throw new IllegalArgumentException("objectReader cannot be null");
}
if (objectWriter == null) {
throw new IllegalArgumentException("objectWriter cannot be null");
}
return new BufferedBulk(this);
}
public Builder withBuffer(ItemSource buffer) {
this.bufferedSource = buffer;
return this;
}
public Builder withObjectWriter(ObjectWriter objectWriter) {
this.objectWriter = objectWriter;
return this;
}
public Builder withObjectReader(ObjectReader objectReader) {
this.objectReader = objectReader;
return this;
}
}
}