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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.plugins;
import org.elasticsearch.Version;
import org.elasticsearch.bootstrap.JarHell;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.xcontent.ToXContentObject;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* An in-memory representation of the plugin descriptor.
*/
public class PluginInfo implements Writeable, ToXContentObject {
public static final String ES_PLUGIN_PROPERTIES = "plugin-descriptor.properties";
public static final String ES_PLUGIN_POLICY = "plugin-security.policy";
private final String name;
private final String description;
private final String version;
private final Version elasticsearchVersion;
private final String javaVersion;
private final String classname;
private final List extendedPlugins;
private final boolean hasNativeController;
/**
* Construct plugin info.
*
* @param name the name of the plugin
* @param description a description of the plugin
* @param version an opaque version identifier for the plugin
* @param elasticsearchVersion the version of Elasticsearch the plugin was built for
* @param javaVersion the version of Java the plugin was built with
* @param classname the entry point to the plugin
* @param extendedPlugins other plugins this plugin extends through SPI
* @param hasNativeController whether or not the plugin has a native controller
*/
public PluginInfo(String name, String description, String version, Version elasticsearchVersion, String javaVersion,
String classname, List extendedPlugins, boolean hasNativeController) {
this.name = name;
this.description = description;
this.version = version;
this.elasticsearchVersion = elasticsearchVersion;
this.javaVersion = javaVersion;
this.classname = classname;
this.extendedPlugins = Collections.unmodifiableList(extendedPlugins);
this.hasNativeController = hasNativeController;
}
/**
* Construct plugin info from a stream.
*
* @param in the stream
* @throws IOException if an I/O exception occurred reading the plugin info from the stream
*/
public PluginInfo(final StreamInput in) throws IOException {
this.name = in.readString();
this.description = in.readString();
this.version = in.readString();
if (in.getVersion().onOrAfter(Version.V_6_3_0)) {
elasticsearchVersion = Version.readVersion(in);
javaVersion = in.readString();
} else {
// the plugin must have the version of whichever node we are talking to, since this is enforced on startup
elasticsearchVersion = in.getVersion();
// this might not be true, but it is not important, we just need something here for bwc that is a valid java version string
javaVersion = "1.8";
}
this.classname = in.readString();
if (in.getVersion().onOrAfter(Version.V_6_2_0)) {
extendedPlugins = in.readStringList();
} else {
extendedPlugins = Collections.emptyList();
}
hasNativeController = in.readBoolean();
if (in.getVersion().onOrAfter(Version.V_6_0_0_beta2) && in.getVersion().before(Version.V_6_3_0)) {
/*
* Elasticsearch versions in [6.0.0-beta2, 6.3.0) allowed plugins to specify that they require the keystore and this was
* serialized into the plugin info. Therefore, we have to read and ignore this value from the stream.
*/
in.readBoolean();
}
}
@Override
public void writeTo(final StreamOutput out) throws IOException {
out.writeString(name);
out.writeString(description);
out.writeString(version);
if (out.getVersion().onOrAfter(Version.V_6_3_0)) {
Version.writeVersion(elasticsearchVersion, out);
out.writeString(javaVersion);
}
out.writeString(classname);
if (out.getVersion().onOrAfter(Version.V_6_2_0)) {
out.writeStringCollection(extendedPlugins);
}
out.writeBoolean(hasNativeController);
if (out.getVersion().onOrAfter(Version.V_6_0_0_beta2) && out.getVersion().before(Version.V_6_3_0)) {
/*
* Elasticsearch versions in [6.0.0-beta2, 6.3.0) allowed plugins to specify that they require the keystore and this was
* serialized into the plugin info. Therefore, we have to write out a value for this boolean.
*/
out.writeBoolean(false);
}
}
/**
* Reads the plugin descriptor file.
*
* @param path the path to the root directory for the plugin
* @return the plugin info
* @throws IOException if an I/O exception occurred reading the plugin descriptor
*/
public static PluginInfo readFromProperties(final Path path) throws IOException {
final Path descriptor = path.resolve(ES_PLUGIN_PROPERTIES);
final Map propsMap;
{
final Properties props = new Properties();
try (InputStream stream = Files.newInputStream(descriptor)) {
props.load(stream);
}
propsMap = props.stringPropertyNames().stream().collect(Collectors.toMap(Function.identity(), props::getProperty));
}
final String name = propsMap.remove("name");
if (name == null || name.isEmpty()) {
throw new IllegalArgumentException(
"property [name] is missing in [" + descriptor + "]");
}
final String description = propsMap.remove("description");
if (description == null) {
throw new IllegalArgumentException(
"property [description] is missing for plugin [" + name + "]");
}
final String version = propsMap.remove("version");
if (version == null) {
throw new IllegalArgumentException(
"property [version] is missing for plugin [" + name + "]");
}
final String esVersionString = propsMap.remove("elasticsearch.version");
if (esVersionString == null) {
throw new IllegalArgumentException(
"property [elasticsearch.version] is missing for plugin [" + name + "]");
}
final Version esVersion = Version.fromString(esVersionString);
final String javaVersionString = propsMap.remove("java.version");
if (javaVersionString == null) {
throw new IllegalArgumentException(
"property [java.version] is missing for plugin [" + name + "]");
}
JarHell.checkVersionFormat(javaVersionString);
final String classname = propsMap.remove("classname");
if (classname == null) {
throw new IllegalArgumentException(
"property [classname] is missing for plugin [" + name + "]");
}
final String extendedString = propsMap.remove("extended.plugins");
final List extendedPlugins;
if (extendedString == null) {
extendedPlugins = Collections.emptyList();
} else {
extendedPlugins = Arrays.asList(Strings.delimitedListToStringArray(extendedString, ","));
}
final String hasNativeControllerValue = propsMap.remove("has.native.controller");
final boolean hasNativeController;
if (hasNativeControllerValue == null) {
hasNativeController = false;
} else {
switch (hasNativeControllerValue) {
case "true":
hasNativeController = true;
break;
case "false":
hasNativeController = false;
break;
default:
final String message = String.format(
Locale.ROOT,
"property [%s] must be [%s], [%s], or unspecified but was [%s]",
"has_native_controller",
"true",
"false",
hasNativeControllerValue);
throw new IllegalArgumentException(message);
}
}
if (esVersion.before(Version.V_6_3_0) && esVersion.onOrAfter(Version.V_6_0_0_beta2)) {
propsMap.remove("requires.keystore");
}
if (propsMap.isEmpty() == false) {
throw new IllegalArgumentException("Unknown properties in plugin descriptor: " + propsMap.keySet());
}
return new PluginInfo(name, description, version, esVersion, javaVersionString,
classname, extendedPlugins, hasNativeController);
}
/**
* The name of the plugin.
*
* @return the plugin name
*/
public String getName() {
return name;
}
/**
* The description of the plugin.
*
* @return the plugin description
*/
public String getDescription() {
return description;
}
/**
* The entry point to the plugin.
*
* @return the entry point to the plugin
*/
public String getClassname() {
return classname;
}
/**
* Other plugins this plugin extends through SPI.
*
* @return the names of the plugins extended
*/
public List getExtendedPlugins() {
return extendedPlugins;
}
/**
* The version of the plugin
*
* @return the version
*/
public String getVersion() {
return version;
}
/**
* The version of Elasticsearch the plugin was built for.
*
* @return an Elasticsearch version
*/
public Version getElasticsearchVersion() {
return elasticsearchVersion;
}
/**
* The version of Java the plugin was built with.
*
* @return a java version string
*/
public String getJavaVersion() {
return javaVersion;
}
/**
* Whether or not the plugin has a native controller.
*
* @return {@code true} if the plugin has a native controller
*/
public boolean hasNativeController() {
return hasNativeController;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
{
builder.field("name", name);
builder.field("version", version);
builder.field("elasticsearch_version", elasticsearchVersion);
builder.field("java_version", javaVersion);
builder.field("description", description);
builder.field("classname", classname);
builder.field("extended_plugins", extendedPlugins);
builder.field("has_native_controller", hasNativeController);
}
builder.endObject();
return builder;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
PluginInfo that = (PluginInfo) o;
if (!name.equals(that.name)) return false;
// TODO: since the plugins are unique by their directory name, this should only be a name check, version should not matter?
if (version != null ? !version.equals(that.version) : that.version != null) return false;
return true;
}
@Override
public int hashCode() {
return name.hashCode();
}
@Override
public String toString() {
return toString("");
}
public String toString(String prefix) {
final StringBuilder information = new StringBuilder()
.append(prefix).append("- Plugin information:\n")
.append(prefix).append("Name: ").append(name).append("\n")
.append(prefix).append("Description: ").append(description).append("\n")
.append(prefix).append("Version: ").append(version).append("\n")
.append(prefix).append("Elasticsearch Version: ").append(elasticsearchVersion).append("\n")
.append(prefix).append("Java Version: ").append(javaVersion).append("\n")
.append(prefix).append("Native Controller: ").append(hasNativeController).append("\n")
.append(prefix).append("Extended Plugins: ").append(extendedPlugins).append("\n")
.append(prefix).append(" * Classname: ").append(classname);
return information.toString();
}
}