/*
* 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.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.xcontent.ToXContent;
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.Locale;
import java.util.Properties;
/**
* An in-memory representation of the plugin descriptor.
*/
public class PluginInfo implements Writeable, ToXContent {
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 String classname;
private final boolean hasNativeController;
/**
* Construct plugin info.
*
* @param name the name of the plugin
* @param description a description of the plugin
* @param version the version of Elasticsearch the plugin is built for
* @param classname the entry point to the plugin
* @param hasNativeController whether or not the plugin has a native controller
*/
public PluginInfo(
final String name,
final String description,
final String version,
final String classname,
final boolean hasNativeController) {
this.name = name;
this.description = description;
this.version = version;
this.classname = classname;
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();
this.classname = in.readString();
if (in.getVersion().onOrAfter(Version.V_5_4_0_UNRELEASED)) {
hasNativeController = in.readBoolean();
} else {
hasNativeController = false;
}
}
@Override
public void writeTo(final StreamOutput out) throws IOException {
out.writeString(name);
out.writeString(description);
out.writeString(version);
out.writeString(classname);
if (out.getVersion().onOrAfter(Version.V_5_4_0_UNRELEASED)) {
out.writeBoolean(hasNativeController);
}
}
/** reads (and validates) plugin metadata descriptor file */
/**
* Reads and validates 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 Properties props = new Properties();
try (InputStream stream = Files.newInputStream(descriptor)) {
props.load(stream);
}
final String name = props.getProperty("name");
if (name == null || name.isEmpty()) {
throw new IllegalArgumentException(
"property [name] is missing in [" + descriptor + "]");
}
final String description = props.getProperty("description");
if (description == null) {
throw new IllegalArgumentException(
"property [description] is missing for plugin [" + name + "]");
}
final String version = props.getProperty("version");
if (version == null) {
throw new IllegalArgumentException(
"property [version] is missing for plugin [" + name + "]");
}
final String esVersionString = props.getProperty("elasticsearch.version");
if (esVersionString == null) {
throw new IllegalArgumentException(
"property [elasticsearch.version] is missing for plugin [" + name + "]");
}
final Version esVersion = Version.fromString(esVersionString);
if (esVersion.equals(Version.CURRENT) == false) {
final String message = String.format(
Locale.ROOT,
"plugin [%s] is incompatible with version [%s]; was designed for version [%s]",
name,
Version.CURRENT.toString(),
esVersionString);
throw new IllegalArgumentException(message);
}
final String javaVersionString = props.getProperty("java.version");
if (javaVersionString == null) {
throw new IllegalArgumentException(
"property [java.version] is missing for plugin [" + name + "]");
}
JarHell.checkVersionFormat(javaVersionString);
JarHell.checkJavaVersion(name, javaVersionString);
final String classname = props.getProperty("classname");
if (classname == null) {
throw new IllegalArgumentException(
"property [classname] is missing for plugin [" + name + "]");
}
final String hasNativeControllerValue = props.getProperty("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);
}
}
return new PluginInfo(name, description, version, classname, 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;
}
/**
* The version of Elasticsearch the plugin was built for.
*
* @return the version
*/
public String getVersion() {
return version;
}
/**
* 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("description", description);
builder.field("classname", classname);
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;
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() {
final StringBuilder information = new StringBuilder()
.append("- Plugin information:\n")
.append("Name: ").append(name).append("\n")
.append("Description: ").append(description).append("\n")
.append("Version: ").append(version).append("\n")
.append("Native Controller: ").append(hasNativeController).append("\n")
.append(" * Classname: ").append(classname);
return information.toString();
}
}