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// Copyright (C) 2012 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.plugins;

import com.google.common.collect.ImmutableSet;
import com.google.gerrit.common.data.GlobalCapability;
import com.google.gerrit.extensions.annotations.RequiresCapability;
import com.google.gerrit.extensions.common.Input;
import com.google.gerrit.extensions.common.PluginInfo;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.PrintWriter;
import java.io.StringWriter;

@RequiresCapability(GlobalCapability.ADMINISTRATE_SERVER)
@Singleton
public class EnablePlugin implements RestModifyView {

  private final PluginLoader loader;

  @Inject
  EnablePlugin(PluginLoader loader) {
    this.loader = loader;
  }

  @Override
  public Response apply(PluginResource resource, Input input) throws RestApiException {
    loader.checkRemoteAdminEnabled();
    String name = resource.getName();
    try {
      loader.enablePlugins(ImmutableSet.of(name));
    } catch (PluginInstallException e) {
      StringWriter buf = new StringWriter();
      buf.write(String.format("cannot enable %s\n", name));
      PrintWriter pw = new PrintWriter(buf);
      e.printStackTrace(pw);
      pw.flush();
      throw new ResourceConflictException(buf.toString());
    }
    return Response.ok(ListPlugins.toPluginInfo(loader.get(name)));
  }
}




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