com.stratio.cassandra.lucene.IndexOptions Maven / Gradle / Ivy
/**
* Copyright (C) 2014 Stratio (http://stratio.com)
*
* 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.
*/
package com.stratio.cassandra.lucene;
import com.google.common.base.MoreObjects;
import com.stratio.cassandra.lucene.schema.Schema;
import com.stratio.cassandra.lucene.schema.SchemaBuilder;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.db.Directories;
import org.apache.cassandra.schema.IndexMetadata;
import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* Lucene {@link Index} user-specified configuration options parser.
*
* @author Andres de la Pena {@literal }
*/
public class IndexOptions {
public static final String REFRESH_SECONDS_OPTION = "refresh_seconds";
public static final double DEFAULT_REFRESH_SECONDS = 60;
public static final String RAM_BUFFER_MB_OPTION = "ram_buffer_mb";
public static final int DEFAULT_RAM_BUFFER_MB = 64;
public static final String MAX_MERGE_MB_OPTION = "max_merge_mb";
public static final int DEFAULT_MAX_MERGE_MB = 5;
public static final String MAX_CACHED_MB_OPTION = "max_cached_mb";
public static final int DEFAULT_MAX_CACHED_MB = 30;
public static final String INDEXING_THREADS_OPTION = "indexing_threads";
public static final int DEFAULT_INDEXING_THREADS = 0;
public static final String INDEXING_QUEUES_SIZE_OPTION = "indexing_queues_size";
public static final int DEFAULT_INDEXING_QUEUES_SIZE = 50;
public static final String EXCLUDED_DATA_CENTERS_OPTION = "excluded_data_centers";
public static final List DEFAULT_EXCLUDED_DATA_CENTERS = Collections.emptyList();
public static final String DIRECTORY_PATH_OPTION = "directory_path";
public static final String INDEXES_DIR_NAME = "lucene";
public static final String SCHEMA_OPTION = "schema";
/** The mapping schema */
public final Schema schema;
/** The path of the directory where the index files will be stored */
public final Path path;
/** The Lucene index searcher refresh frequency, in seconds */
public final double refreshSeconds;
/** The Lucene's max RAM buffer size, in MB */
public final int ramBufferMB;
/** The Lucene's max segments merge size size, in MB */
public final int maxMergeMB;
/** The Lucene's max cache size, in MB */
public final int maxCachedMB;
/** The number of asynchronous indexing threads */
public final int indexingThreads;
/** The size of the asynchronous indexing queues */
public final int indexingQueuesSize;
/** The names of the data centers excluded from indexing */
public final List excludedDataCenters;
/**
* Builds a new {@link IndexOptions} for the column family and index metadata.
*
* @param tableMetadata the indexed table metadata
* @param indexMetadata the index metadata
*/
IndexOptions(CFMetaData tableMetadata, IndexMetadata indexMetadata) {
Map options = indexMetadata.options;
refreshSeconds = parseRefresh(options);
ramBufferMB = parseRamBufferMB(options);
maxMergeMB = parseMaxMergeMB(options);
maxCachedMB = parseMaxCachedMB(options);
indexingThreads = parseIndexingThreads(options);
indexingQueuesSize = parseIndexingQueuesSize(options);
excludedDataCenters = parseExcludedDataCenters(options);
path = parsePath(options, tableMetadata, indexMetadata);
schema = parseSchema(options, tableMetadata);
}
/**
* Validates the specified index options.
*
* @param options the options to be validated
* @param metadata the indexed table metadata
*/
static void validateOptions(Map options, CFMetaData metadata) {
parseRefresh(options);
parseRamBufferMB(options);
parseMaxMergeMB(options);
parseMaxCachedMB(options);
parseIndexingThreads(options);
parseIndexingQueuesSize(options);
parseExcludedDataCenters(options);
parseSchema(options, metadata);
parsePath(options, metadata, null);
}
private static double parseRefresh(Map options) {
String refreshOption = options.get(REFRESH_SECONDS_OPTION);
if (refreshOption != null) {
double refreshSeconds;
try {
refreshSeconds = Double.parseDouble(refreshOption);
} catch (NumberFormatException e) {
throw new IndexException("'%s' must be a strictly positive double", REFRESH_SECONDS_OPTION);
}
if (refreshSeconds <= 0) {
throw new IndexException("'%s' must be strictly positive", REFRESH_SECONDS_OPTION);
}
return refreshSeconds;
} else {
return DEFAULT_REFRESH_SECONDS;
}
}
private static int parseRamBufferMB(Map options) {
String ramBufferSizeOption = options.get(RAM_BUFFER_MB_OPTION);
if (ramBufferSizeOption != null) {
int ramBufferMB;
try {
ramBufferMB = Integer.parseInt(ramBufferSizeOption);
} catch (NumberFormatException e) {
throw new IndexException("'%s' must be a strictly positive integer", RAM_BUFFER_MB_OPTION);
}
if (ramBufferMB <= 0) {
throw new IndexException("'%s' must be strictly positive", RAM_BUFFER_MB_OPTION);
}
return ramBufferMB;
} else {
return DEFAULT_RAM_BUFFER_MB;
}
}
private static int parseMaxMergeMB(Map options) {
String maxMergeSizeMBOption = options.get(MAX_MERGE_MB_OPTION);
if (maxMergeSizeMBOption != null) {
int maxMergeMB;
try {
maxMergeMB = Integer.parseInt(maxMergeSizeMBOption);
} catch (NumberFormatException e) {
throw new IndexException("'%s' must be a strictly positive integer", MAX_MERGE_MB_OPTION);
}
if (maxMergeMB <= 0) {
throw new IndexException("'%s' must be strictly positive", MAX_MERGE_MB_OPTION);
}
return maxMergeMB;
} else {
return DEFAULT_MAX_MERGE_MB;
}
}
private static int parseMaxCachedMB(Map options) {
String maxCachedMBOption = options.get(MAX_CACHED_MB_OPTION);
if (maxCachedMBOption != null) {
int maxCachedMB;
try {
maxCachedMB = Integer.parseInt(maxCachedMBOption);
} catch (NumberFormatException e) {
throw new IndexException("'%s' must be a strictly positive integer", MAX_CACHED_MB_OPTION);
}
if (maxCachedMB <= 0) {
throw new IndexException("'%s' must be strictly positive", MAX_CACHED_MB_OPTION);
}
return maxCachedMB;
} else {
return DEFAULT_MAX_CACHED_MB;
}
}
private static int parseIndexingThreads(Map options) {
String indexPoolNumQueuesOption = options.get(INDEXING_THREADS_OPTION);
if (indexPoolNumQueuesOption != null) {
try {
return Integer.parseInt(indexPoolNumQueuesOption);
} catch (NumberFormatException e) {
throw new IndexException("'%s' must be a positive integer", INDEXING_THREADS_OPTION);
}
} else {
return DEFAULT_INDEXING_THREADS;
}
}
private static int parseIndexingQueuesSize(Map options) {
String indexPoolQueuesSizeOption = options.get(INDEXING_QUEUES_SIZE_OPTION);
if (indexPoolQueuesSizeOption != null) {
int indexingQueuesSize;
try {
indexingQueuesSize = Integer.parseInt(indexPoolQueuesSizeOption);
} catch (NumberFormatException e) {
throw new IndexException("'%s' must be a strictly positive integer", INDEXING_QUEUES_SIZE_OPTION);
}
if (indexingQueuesSize <= 0) {
throw new IndexException("'%s' must be strictly positive", INDEXING_QUEUES_SIZE_OPTION);
}
return indexingQueuesSize;
} else {
return DEFAULT_INDEXING_QUEUES_SIZE;
}
}
private static List parseExcludedDataCenters(Map options) {
String excludedDataCentersOption = options.get(EXCLUDED_DATA_CENTERS_OPTION);
if (excludedDataCentersOption != null) {
String[] array = excludedDataCentersOption.trim().split(",");
return Arrays.asList(array);
} else {
return DEFAULT_EXCLUDED_DATA_CENTERS;
}
}
private static Path parsePath(Map options, CFMetaData tableMetadata, IndexMetadata indexMetadata) {
String pathOption = options.get(DIRECTORY_PATH_OPTION);
if (pathOption != null) {
return Paths.get(pathOption);
} else if (indexMetadata != null) {
Directories directories = new Directories(tableMetadata);
String basePath = directories.getDirectoryForNewSSTables().getAbsolutePath();
return Paths.get(basePath + File.separator + INDEXES_DIR_NAME + File.separator + indexMetadata.name);
}
return null;
}
private static Schema parseSchema(Map options, CFMetaData tableMetadata) {
String schemaOption = options.get(SCHEMA_OPTION);
if (schemaOption != null && !schemaOption.trim().isEmpty()) {
Schema schema;
try {
schema = SchemaBuilder.fromJson(schemaOption).build();
schema.validate(tableMetadata);
return schema;
} catch (Exception e) {
throw new IndexException(e, "'%s' is invalid : %s", SCHEMA_OPTION, e.getMessage());
}
} else {
throw new IndexException("'%s' required", SCHEMA_OPTION);
}
}
/** {@inheritDoc} */
@Override
public String toString() {
return MoreObjects.toStringHelper(this)
.add("refreshSeconds", refreshSeconds)
.add("ramBufferMB", ramBufferMB)
.add("maxMergeMB", maxMergeMB)
.add("maxCachedMB", maxCachedMB)
.add("indexingThreads", indexingThreads)
.add("indexingQueuesSize", indexingQueuesSize)
.add("excludedDataCenters", excludedDataCenters)
.add("path", path)
.add("schema", schema)
.toString();
}
}
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