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Extract AbstractHealthAggregator
This commit makes it easier for users to implement HealthAggregators
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/*
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* Copyright 2012-2014 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.boot.actuate.health;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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/**
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* Base {@link HealthAggregator} implementation to allow subclasses to focus on
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* aggregating the {@link Status} instances and not deal with contextual details etc.
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*
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* @author Christian Dupuis
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* @since 1.1.0
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*/
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public abstract class AbstractHealthAggregator implements HealthAggregator {
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@Override
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public final Health aggregate(Map<String, Health> healths) {
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Health health = new Health();
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List<Status> status = new ArrayList<Status>();
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for (Map.Entry<String, Health> h : healths.entrySet()) {
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health.withDetail(h.getKey(), h.getValue());
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status.add(h.getValue().getStatus());
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}
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health.status(aggregateStatus(status));
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return health;
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}
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protected abstract Status aggregateStatus(List<Status> status);
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}
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@ -16,12 +16,10 @@
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package org.springframework.boot.actuate.health;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import java.util.Map;
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/**
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* Default {@link HealthAggregator} implementation that aggregates {@link Health}
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@ -34,48 +32,41 @@ import java.util.Map;
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* @author Christian Dupuis
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* @since 1.1.0
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*/
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public class OrderedHealthAggregator implements HealthAggregator {
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public class OrderedHealthAggregator extends AbstractHealthAggregator {
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private List<String> statusOrder = Arrays.asList("DOWN", "OUT_OF_SERVICE", "UP",
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"UNKOWN");
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@Override
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public Health aggregate(Map<String, Health> healths) {
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Health health = new Health();
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List<Status> status = new ArrayList<Status>();
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for (Map.Entry<String, Health> h : healths.entrySet()) {
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health.withDetail(h.getKey(), h.getValue());
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status.add(h.getValue().getStatus());
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}
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health.status(aggregateStatus(status));
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return health;
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}
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public void setStatusOrder(List<String> statusOrder) {
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this.statusOrder = statusOrder;
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}
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@Override
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protected Status aggregateStatus(List<Status> status) {
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// If no status is given return UNKOWN
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if (status.size() == 0) {
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return Status.UNKOWN;
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}
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Collections.sort(status, new Comparator<Status>() {
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@Override
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public int compare(Status s1, Status s2) {
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return Integer.valueOf(
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OrderedHealthAggregator.this.statusOrder.indexOf(s1.getCode()))
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.compareTo(
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Integer.valueOf(OrderedHealthAggregator.this.statusOrder
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.indexOf(s2.getCode())));
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}
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});
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// Sort given Status instances by configured order
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Collections.sort(status, new StatusComparator(this.statusOrder));
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return status.get(0);
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}
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private class StatusComparator implements Comparator<Status> {
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private final List<String> statusOrder;
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public StatusComparator(List<String> statusOrder) {
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this.statusOrder = statusOrder;
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}
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@Override
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public int compare(Status s1, Status s2) {
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return Integer.valueOf(this.statusOrder.indexOf(s1.getCode())).compareTo(
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Integer.valueOf(this.statusOrder.indexOf(s2.getCode())));
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}
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}
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}
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