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// Copyright (C) 2015 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.metrics.dropwizard;
import com.codahale.metrics.Metric;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.config.ConfigResource;
import com.google.gerrit.server.permissions.GlobalPermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.inject.Inject;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import org.kohsuke.args4j.Option;
class ListMetrics implements RestReadView<ConfigResource> {
private final PermissionBackend permissionBackend;
private final DropWizardMetricMaker metrics;
@Option(name = "--data-only", usage = "return only values")
boolean dataOnly;
@Option(
name = "--prefix",
aliases = {"-p"},
metaVar = "PREFIX",
usage = "match metric by exact match or prefix")
List<String> query = new ArrayList<>();
@Inject
ListMetrics(PermissionBackend permissionBackend, DropWizardMetricMaker metrics) {
this.permissionBackend = permissionBackend;
this.metrics = metrics;
}
@Override
public Response<Map<String, MetricJson>> apply(ConfigResource resource)
throws AuthException, PermissionBackendException {
permissionBackend.currentUser().check(GlobalPermission.VIEW_CACHES);
SortedMap<String, MetricJson> out = new TreeMap<>();
List<String> prefixes = new ArrayList<>(query.size());
for (String q : query) {
if (q.endsWith("/")) {
prefixes.add(q);
} else {
Metric m = metrics.getMetric(q);
if (m != null) {
out.put(q, toJson(q, m));
}
}
}
if (query.isEmpty() || !prefixes.isEmpty()) {
for (String name : metrics.getMetricNames()) {
if (include(prefixes, name)) {
out.put(name, toJson(name, metrics.getMetric(name)));
}
}
}
return Response.ok(out);
}
private MetricJson toJson(String q, Metric m) {
return new MetricJson(m, metrics.getAnnotations(q), dataOnly);
}
private static boolean include(List<String> prefixes, String name) {
if (prefixes.isEmpty()) {
return true;
}
for (String p : prefixes) {
if (name.startsWith(p)) {
return true;
}
}
return false;
}
}
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