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/*
* 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.hudi.common.config;
import org.apache.hudi.common.fs.FSUtils;
import org.apache.hudi.common.util.Option;
import org.apache.hudi.common.util.StringUtils;
import org.apache.hudi.common.util.ValidationUtils;
import org.apache.hudi.exception.HoodieException;
import org.apache.hudi.exception.HoodieIOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.HashSet;
import java.util.Set;
/**
* A simplified versions of Apache commons - PropertiesConfiguration, that supports limited field types and hierarchical
* configurations within the same folder as the root file.
*
* Includes denoted by the same include=filename.properties syntax, with relative path from root file's folder. Lines
* beginning with '#' are ignored as comments. Final values for properties are resolved by the order in which they are
* specified in the files, with included files treated as if they are inline.
*
* Note: Not reusing commons-configuration since it has too many conflicting runtime deps.
*/
public class DFSPropertiesConfiguration {
private static final Logger LOG = LoggerFactory.getLogger(DFSPropertiesConfiguration.class);
public static final String DEFAULT_PROPERTIES_FILE = "hudi-defaults.conf";
public static final String CONF_FILE_DIR_ENV_NAME = "HUDI_CONF_DIR";
public static final String DEFAULT_CONF_FILE_DIR = "file:/etc/hudi/conf";
public static final Path DEFAULT_PATH = new Path(DEFAULT_CONF_FILE_DIR + "/" + DEFAULT_PROPERTIES_FILE);
// props read from hudi-defaults.conf
private static TypedProperties GLOBAL_PROPS = loadGlobalProps();
@Nullable
private final Configuration hadoopConfig;
private Path mainFilePath;
// props read from user defined configuration file or input stream
private final HoodieConfig hoodieConfig;
// Keep track of files visited, to detect loops
private final Set visitedFilePaths;
public DFSPropertiesConfiguration(@Nonnull Configuration hadoopConf, @Nonnull Path filePath) {
this.hadoopConfig = hadoopConf;
this.mainFilePath = filePath;
this.hoodieConfig = new HoodieConfig();
this.visitedFilePaths = new HashSet<>();
addPropsFromFile(filePath);
}
public DFSPropertiesConfiguration() {
this.hadoopConfig = null;
this.mainFilePath = null;
this.hoodieConfig = new HoodieConfig();
this.visitedFilePaths = new HashSet<>();
}
/**
* Load global props from hudi-defaults.conf which is under class loader or CONF_FILE_DIR_ENV_NAME.
* @return Typed Properties
*/
public static TypedProperties loadGlobalProps() {
DFSPropertiesConfiguration conf = new DFSPropertiesConfiguration();
// First try loading the external config file from class loader
URL configFile = Thread.currentThread().getContextClassLoader().getResource(DEFAULT_PROPERTIES_FILE);
if (configFile != null) {
try (BufferedReader br = new BufferedReader(new InputStreamReader(configFile.openStream()))) {
conf.addPropsFromStream(br, new Path(configFile.toURI()));
return conf.getProps();
} catch (URISyntaxException e) {
throw new HoodieException(String.format("Provided props file url is invalid %s", configFile), e);
} catch (IOException ioe) {
throw new HoodieIOException(
String.format("Failed to read %s from class loader", DEFAULT_PROPERTIES_FILE), ioe);
}
}
// Try loading the external config file from local file system
Option defaultConfPath = getConfPathFromEnv();
if (defaultConfPath.isPresent()) {
conf.addPropsFromFile(defaultConfPath.get());
} else {
try {
conf.addPropsFromFile(DEFAULT_PATH);
} catch (Exception e) {
LOG.warn("Cannot load default config file: " + DEFAULT_PATH, e);
}
}
return conf.getProps();
}
public static void refreshGlobalProps() {
GLOBAL_PROPS = loadGlobalProps();
}
public static void clearGlobalProps() {
GLOBAL_PROPS = new TypedProperties();
}
/**
* Add properties from external configuration files.
*
* @param filePath File path for configuration file
*/
public void addPropsFromFile(Path filePath) {
if (visitedFilePaths.contains(filePath.toString())) {
throw new IllegalStateException("Loop detected; file " + filePath + " already referenced");
}
FileSystem fs = FSUtils.getFs(
filePath.toString(),
Option.ofNullable(hadoopConfig).orElseGet(Configuration::new)
);
try {
if (filePath.equals(DEFAULT_PATH) && !fs.exists(filePath)) {
LOG.warn("Properties file " + filePath + " not found. Ignoring to load props file");
return;
}
} catch (IOException ioe) {
throw new HoodieIOException("Cannot check if the properties file exist: " + filePath, ioe);
}
try (BufferedReader reader = new BufferedReader(new InputStreamReader(fs.open(filePath)))) {
visitedFilePaths.add(filePath.toString());
addPropsFromStream(reader, filePath);
} catch (IOException ioe) {
LOG.error("Error reading in properties from dfs from file " + filePath);
throw new HoodieIOException("Cannot read properties from dfs from file " + filePath, ioe);
}
}
/**
* Add properties from buffered reader.
*
* @param reader Buffered Reader
* @throws IOException
*/
public void addPropsFromStream(BufferedReader reader, Path cfgFilePath) throws IOException {
try {
reader.lines().forEach(line -> {
if (!isValidLine(line)) {
return;
}
String[] split = splitProperty(line);
if (line.startsWith("include=") || line.startsWith("include =")) {
Path providedPath = new Path(split[1]);
FileSystem providedFs = FSUtils.getFs(split[1], hadoopConfig);
// In the case that only filename is provided, assume it's in the same directory.
if ((!providedPath.isAbsolute() || StringUtils.isNullOrEmpty(providedFs.getScheme()))
&& cfgFilePath != null) {
providedPath = new Path(cfgFilePath.getParent(), split[1]);
}
addPropsFromFile(providedPath);
} else {
hoodieConfig.setValue(split[0], split[1]);
}
});
} finally {
reader.close();
}
}
public static TypedProperties getGlobalProps() {
final TypedProperties globalProps = new TypedProperties();
globalProps.putAll(GLOBAL_PROPS);
return globalProps;
}
// test only
public static TypedProperties addToGlobalProps(String key, String value) {
GLOBAL_PROPS.put(key, value);
return GLOBAL_PROPS;
}
public TypedProperties getProps() {
return new TypedProperties(hoodieConfig.getProps());
}
public TypedProperties getProps(boolean includeGlobalProps) {
return new TypedProperties(hoodieConfig.getProps(includeGlobalProps));
}
private static Option getConfPathFromEnv() {
String confDir = System.getenv(CONF_FILE_DIR_ENV_NAME);
if (confDir == null) {
LOG.warn("Cannot find " + CONF_FILE_DIR_ENV_NAME + ", please set it as the dir of " + DEFAULT_PROPERTIES_FILE);
return Option.empty();
}
if (StringUtils.isNullOrEmpty(URI.create(confDir).getScheme())) {
confDir = "file://" + confDir;
}
return Option.of(new Path(confDir + File.separator + DEFAULT_PROPERTIES_FILE));
}
private String[] splitProperty(String line) {
line = line.replaceAll("\\s+", " ");
String delimiter = line.contains("=") ? "=" : " ";
int ind = line.indexOf(delimiter);
String k = line.substring(0, ind).trim();
String v = line.substring(ind + 1).trim();
return new String[] {k, v};
}
private boolean isValidLine(String line) {
ValidationUtils.checkArgument(line != null, "passed line is null");
if (line.startsWith("#") || line.equals("")) {
return false;
}
return line.contains("=") || line.matches(".*\\s.*");
}
}
