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// Copyright (C) 2014 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.restapi.config;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.gerrit.common.data.GlobalCapability.MAINTAIN_SERVER;
import static com.google.gerrit.common.data.GlobalCapability.VIEW_CACHES;
import static com.google.gerrit.server.config.CacheResource.cacheNameOf;
import static java.nio.charset.StandardCharsets.UTF_8;
import static java.util.stream.Collectors.joining;
import com.google.common.cache.Cache;
import com.google.common.collect.Streams;
import com.google.gerrit.extensions.annotations.RequiresAnyCapability;
import com.google.gerrit.extensions.registration.DynamicMap;
import com.google.gerrit.extensions.registration.Extension;
import com.google.gerrit.extensions.restapi.BinaryResult;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.cache.CacheInfo;
import com.google.gerrit.server.config.ConfigResource;
import com.google.inject.Inject;
import java.util.Map;
import java.util.TreeMap;
import java.util.stream.Stream;
import org.kohsuke.args4j.Option;
@RequiresAnyCapability({VIEW_CACHES, MAINTAIN_SERVER})
public class ListCaches implements RestReadView<ConfigResource> {
private final DynamicMap<Cache<?, ?>> cacheMap;
public enum OutputFormat {
LIST,
TEXT_LIST
}
@Option(name = "--format", usage = "output format")
private OutputFormat format;
public ListCaches setFormat(OutputFormat format) {
this.format = format;
return this;
}
@Inject
public ListCaches(DynamicMap<Cache<?, ?>> cacheMap) {
this.cacheMap = cacheMap;
}
public Map<String, CacheInfo> getCacheInfos() {
Map<String, CacheInfo> cacheInfos = new TreeMap<>();
for (Extension<Cache<?, ?>> e : cacheMap) {
cacheInfos.put(
cacheNameOf(e.getPluginName(), e.getExportName()), new CacheInfo(e.getProvider().get()));
}
return cacheInfos;
}
@Override
public Response<Object> apply(ConfigResource rsrc) {
if (format == null) {
return Response.ok(getCacheInfos());
}
Stream<String> cacheNames =
Streams.stream(cacheMap)
.map(e -> cacheNameOf(e.getPluginName(), e.getExportName()))
.sorted();
if (OutputFormat.TEXT_LIST.equals(format)) {
return Response.ok(
BinaryResult.create(cacheNames.collect(joining("\n")))
.base64()
.setContentType("text/plain")
.setCharacterEncoding(UTF_8));
}
return Response.ok(cacheNames.collect(toImmutableList()));
}
}
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