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InstanceDiscoveryFilter.java
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InstanceDiscoveryFilter.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.servicecomb.springboot.common;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.servicecomb.foundation.common.net.URIEndpointObject;
import org.apache.servicecomb.serviceregistry.api.registry.MicroserviceInstance;
import org.apache.servicecomb.serviceregistry.discovery.DiscoveryContext;
import org.apache.servicecomb.serviceregistry.discovery.DiscoveryFilter;
import org.apache.servicecomb.serviceregistry.discovery.DiscoveryTreeNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class InstanceDiscoveryFilter implements DiscoveryFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(InstanceDiscoveryFilter.class);
public interface InstanceFactory {
Object createInstance(String name, URIEndpointObject uri);
}
InstanceFactory instanceFactory;
public InstanceDiscoveryFilter(InstanceFactory factory){
instanceFactory = factory;
}
@Override
public int getOrder() {
return Short.MAX_VALUE;
}
@Override
public DiscoveryTreeNode discovery(DiscoveryContext context, DiscoveryTreeNode parent) {
return parent.children()
.computeIfAbsent(context.getInputParameters(), etn -> createDiscoveryTreeNode(context, parent));
}
@SuppressWarnings("unchecked")
protected DiscoveryTreeNode createDiscoveryTreeNode(DiscoveryContext context,
DiscoveryTreeNode parent) {
String serviceName = context.getInputParameters();
List<Object> instances = new ArrayList<>();
for (MicroserviceInstance instance : ((Map<String, MicroserviceInstance>) parent.data()).values()) {
for (String endpoint : instance.getEndpoints()) {
String scheme = endpoint.split(":", 2)[0];
if (!scheme.equalsIgnoreCase("rest")) {
LOGGER.info("Endpoint {} is not supported in Spring Cloud, ignoring.", endpoint);
continue;
}
URIEndpointObject uri = new URIEndpointObject(endpoint);
instances.add(instanceFactory.createInstance(serviceName, uri));
}
}
return new DiscoveryTreeNode()
.subName(parent, serviceName)
.data(instances);
}
};