| // Copyright (C) 2020 The Android Open Source Project |
| // |
| // 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.google.gerrit.server.config; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Enums; |
| import com.google.common.base.Strings; |
| |
| /* SSH implementation to use by JGit SSH client transport protocol. */ |
| public enum SshClientImplementation { |
| /** JCraft JSch implementation. */ |
| JSCH, |
| |
| /** Apache MINA implementation. */ |
| APACHE; |
| |
| private static final String ENV_VAR = "SSH_CLIENT_IMPLEMENTATION"; |
| private static final String SYS_PROP = "gerrit.sshClientImplementation"; |
| |
| @VisibleForTesting |
| public static SshClientImplementation getFromEnvironment() { |
| String value = System.getenv(ENV_VAR); |
| if (Strings.isNullOrEmpty(value)) { |
| value = System.getProperty(SYS_PROP); |
| } |
| if (Strings.isNullOrEmpty(value)) { |
| return APACHE; |
| } |
| SshClientImplementation client = |
| Enums.getIfPresent(SshClientImplementation.class, value).orNull(); |
| if (!Strings.isNullOrEmpty(System.getenv(ENV_VAR))) { |
| checkArgument( |
| client != null, "Invalid value for env variable %s: %s", ENV_VAR, System.getenv(ENV_VAR)); |
| } else { |
| checkArgument( |
| client != null, |
| "Invalid value for system property %s: %s", |
| SYS_PROP, |
| System.getProperty(SYS_PROP)); |
| } |
| return client; |
| } |
| |
| public boolean isMina() { |
| return this == APACHE; |
| } |
| } |