reset dubbo 3.1.2 => 3.1.0 降级处理 问题依旧存在

ruoyi-common/ruoyi-common-alibaba-bom/pom.xml

@@ -19,7 +19,7 @@
         <seata.version>1.5.2</seata.version>
         <nacos.client.version>2.1.2</nacos.client.version>
         <nacos.config.version>2.0.4</nacos.config.version>
-        <dubbo.version>3.1.2</dubbo.version>
+        <dubbo.version>3.1.0</dubbo.version>
         <spring.context.support.version>1.0.11</spring.context.support.version>
     </properties>
     <dependencyManagement>

ruoyi-common/ruoyi-common-dubbo/src/main/java/org/apache/dubbo/metadata/MetadataInfo.java

@@ -0,0 +1,838 @@
+/*
+ * 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.dubbo.metadata;
+
+import org.apache.dubbo.common.ProtocolServiceKey;
+import org.apache.dubbo.common.URL;
+import org.apache.dubbo.common.extension.ExtensionLoader;
+import org.apache.dubbo.common.logger.Logger;
+import org.apache.dubbo.common.logger.LoggerFactory;
+import org.apache.dubbo.common.url.component.URLParam;
+import org.apache.dubbo.common.utils.ArrayUtils;
+import org.apache.dubbo.common.utils.CollectionUtils;
+import org.apache.dubbo.common.utils.JsonUtils;
+import org.apache.dubbo.common.utils.StringUtils;
+
+import java.beans.Transient;
+import java.io.Serializable;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.SortedSet;
+import java.util.TreeMap;
+import java.util.TreeSet;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentNavigableMap;
+import java.util.concurrent.ConcurrentSkipListMap;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.stream.Collectors;
+
+import static org.apache.dubbo.common.constants.CommonConstants.DOT_SEPARATOR;
+import static org.apache.dubbo.common.constants.CommonConstants.GROUP_CHAR_SEPARATOR;
+import static org.apache.dubbo.common.constants.CommonConstants.METHODS_KEY;
+import static org.apache.dubbo.common.constants.CommonConstants.TIMESTAMP_KEY;
+import static org.apache.dubbo.metadata.RevisionResolver.EMPTY_REVISION;
+
+public class MetadataInfo implements Serializable {
+    public static final MetadataInfo EMPTY = new MetadataInfo();
+    private static final Logger logger = LoggerFactory.getLogger(MetadataInfo.class);
+
+    private String app;
+    // revision that will report to registry or remote meta center, must always update together with rawMetadataInfo, check {@link this#calAndGetRevision}
+    private volatile String revision;
+    // key format is '{group}/{interface name}:{version}:{protocol}'
+    private final Map<String, ServiceInfo> services;
+
+    /* used at runtime */
+    private transient AtomicBoolean initiated = new AtomicBoolean(false);
+    // Json formatted metadata that will report to remote meta center, must always update together with revision, check {@link this#calAndGetRevision}
+    private transient volatile String rawMetadataInfo;
+    // key format is '{group}/{interface name}:{version}'
+    private transient Map<String, Set<ServiceInfo>> subscribedServices;
+    private transient final Map<String, String> extendParams;
+    private transient final Map<String, String> instanceParams;
+    protected transient volatile boolean updated = false;
+    private transient ConcurrentNavigableMap<String, SortedSet<URL>> subscribedServiceURLs;
+    private transient ConcurrentNavigableMap<String, SortedSet<URL>> exportedServiceURLs;
+    private transient ExtensionLoader<MetadataParamsFilter> loader;
+
+    public MetadataInfo() {
+        this(null);
+    }
+
+    public MetadataInfo(String app) {
+        this(app, null, null);
+    }
+
+    public MetadataInfo(String app, String revision, Map<String, ServiceInfo> services) {
+        this.app = app;
+        this.revision = revision;
+        this.services = services == null ? new ConcurrentHashMap<>() : services;
+        this.extendParams = new ConcurrentHashMap<>();
+        this.instanceParams = new ConcurrentHashMap<>();
+    }
+
+    private MetadataInfo(String app, String revision, Map<String, ServiceInfo> services, AtomicBoolean initiated,
+                         Map<String, String> extendParams, Map<String, String> instanceParams, boolean updated,
+                         ConcurrentNavigableMap<String, SortedSet<URL>> subscribedServiceURLs,
+                         ConcurrentNavigableMap<String, SortedSet<URL>> exportedServiceURLs,
+                         ExtensionLoader<MetadataParamsFilter> loader) {
+        this.app = app;
+        this.revision = revision;
+        this.services = new ConcurrentHashMap<>(services);
+        this.initiated = new AtomicBoolean(initiated.get());
+        this.extendParams = new ConcurrentHashMap<>(extendParams);
+        this.instanceParams = new ConcurrentHashMap<>(instanceParams);
+        this.updated = updated;
+        this.subscribedServiceURLs = subscribedServiceURLs == null ? null : new ConcurrentSkipListMap<>(subscribedServiceURLs);
+        this.exportedServiceURLs = exportedServiceURLs == null ? null : new ConcurrentSkipListMap<>(exportedServiceURLs);
+        this.loader = loader;
+    }
+
+    /**
+     * Initialize is needed when MetadataInfo is created from deserialization on the consumer side before being used for RPC call.
+     */
+    public void init() {
+        if (!initiated.compareAndSet(false, true)) {
+            return;
+        }
+        if (CollectionUtils.isNotEmptyMap(services)) {
+            services.forEach((_k, serviceInfo) -> {
+                serviceInfo.init();
+                // create duplicate serviceKey(without protocol)->serviceInfo mapping to support metadata search when protocol is not specified on consumer side.
+                if (subscribedServices == null) {
+                    subscribedServices = new HashMap<>();
+                }
+                Set<ServiceInfo> serviceInfos = subscribedServices.computeIfAbsent(serviceInfo.getServiceKey(), _key -> new HashSet<>());
+                serviceInfos.add(serviceInfo);
+            });
+        }
+    }
+
+    public synchronized void addService(URL url) {
+        // fixme, pass in application mode context during initialization of MetadataInfo.
+        if (this.loader == null) {
+            this.loader = url.getOrDefaultApplicationModel().getExtensionLoader(MetadataParamsFilter.class);
+        }
+        List<MetadataParamsFilter> filters = loader.getActivateExtension(url, "params-filter");
+        // generate service level metadata
+        ServiceInfo serviceInfo = new ServiceInfo(url, filters);
+        this.services.put(serviceInfo.getMatchKey(), serviceInfo);
+        // extract common instance level params
+        extractInstanceParams(url, filters);
+
+        if (exportedServiceURLs == null) {
+            exportedServiceURLs = new ConcurrentSkipListMap<>();
+        }
+        addURL(exportedServiceURLs, url);
+        updated = true;
+    }
+
+    public synchronized void removeService(URL url) {
+        if (url == null) {
+            return;
+        }
+        this.services.remove(url.getProtocolServiceKey());
+        if (exportedServiceURLs != null) {
+            removeURL(exportedServiceURLs, url);
+        }
+
+        updated = true;
+    }
+
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * Calculation of this instance's status like revision and modification of the same instance must be synchronized among different threads.
+     * <p>
+     * Usage of this method is strictly restricted to certain points such as when during registration. Always try to use {@link this#getRevision()} instead.
+     */
+    public synchronized String calAndGetRevision() {
+        if (revision != null && !updated) {
+            return revision;
+        }
+
+        updated = false;
+
+        if (CollectionUtils.isEmptyMap(services)) {
+            this.revision = EMPTY_REVISION;
+        } else {
+            StringBuilder sb = new StringBuilder();
+            sb.append(app);
+            for (Map.Entry<String, ServiceInfo> entry : new TreeMap<>(services).entrySet()) {
+                sb.append(entry.getValue().toDescString());
+            }
+            String tempRevision = RevisionResolver.calRevision(sb.toString());
+            if (!StringUtils.isEquals(this.revision, tempRevision)) {
+                if (logger.isInfoEnabled()) {
+                    logger.info(String.format("metadata revision changed: %s -> %s, app: %s, services: %d", this.revision, tempRevision, this.app, this.services.size()));
+                }
+                this.revision = tempRevision;
+                this.rawMetadataInfo = JsonUtils.getJson().toJson(this);
+            }
+        }
+        return revision;
+    }
+
+    public void setRevision(String revision) {
+        this.revision = revision;
+    }
+
+    @Transient
+    public String getContent() {
+        return this.rawMetadataInfo;
+    }
+
+    public String getApp() {
+        return app;
+    }
+
+    public void setApp(String app) {
+        this.app = app;
+    }
+
+    public Map<String, ServiceInfo> getServices() {
+        return services;
+    }
+
+    /**
+     * Get service info of an interface with specified group, version and protocol
+     * @param protocolServiceKey key is of format '{group}/{interface name}:{version}:{protocol}'
+     * @return the specific service info related to protocolServiceKey
+     */
+    public ServiceInfo getServiceInfo(String protocolServiceKey) {
+        return services.get(protocolServiceKey);
+    }
+
+    /**
+     * Get service infos of an interface with specified group, version.
+     * There may have several service infos of different protocols, this method will simply pick the first one.
+     *
+     * @param serviceKeyWithoutProtocol key is of format '{group}/{interface name}:{version}'
+     * @return the first service info related to serviceKey
+     */
+    public ServiceInfo getNoProtocolServiceInfo(String serviceKeyWithoutProtocol) {
+        if (CollectionUtils.isEmptyMap(subscribedServices)) {
+            return null;
+        }
+        Set<ServiceInfo> subServices = subscribedServices.get(serviceKeyWithoutProtocol);
+        if (CollectionUtils.isNotEmpty(subServices)) {
+            return subServices.iterator().next();
+        }
+        return null;
+    }
+
+    public ServiceInfo getValidServiceInfo(String serviceKey) {
+        ServiceInfo serviceInfo = getServiceInfo(serviceKey);
+        if (serviceInfo == null) {
+            serviceInfo = getNoProtocolServiceInfo(serviceKey);
+            if (serviceInfo == null) {
+                return null;
+            }
+        }
+        return serviceInfo;
+    }
+
+    public List<ServiceInfo> getMatchedServiceInfos(ProtocolServiceKey consumerProtocolServiceKey) {
+        return getServices().values()
+            .stream()
+            .filter(serviceInfo -> serviceInfo.matchProtocolServiceKey(consumerProtocolServiceKey))
+            .collect(Collectors.toList());
+    }
+
+    public Map<String, String> getExtendParams() {
+        return extendParams;
+    }
+
+    public Map<String, String> getInstanceParams() {
+        return instanceParams;
+    }
+
+    public String getParameter(String key, String serviceKey) {
+        ServiceInfo serviceInfo = getValidServiceInfo(serviceKey);
+        if (serviceInfo == null) return null;
+        return serviceInfo.getParameter(key);
+    }
+
+    public Map<String, String> getParameters(String serviceKey) {
+        ServiceInfo serviceInfo = getValidServiceInfo(serviceKey);
+        if (serviceInfo == null) {
+            return Collections.emptyMap();
+        }
+        return serviceInfo.getAllParams();
+    }
+
+    public String getServiceString(String protocolServiceKey) {
+        if (protocolServiceKey == null) {
+            return null;
+        }
+
+        ServiceInfo serviceInfo = getValidServiceInfo(protocolServiceKey);
+        if (serviceInfo == null) {
+            return null;
+        }
+        return serviceInfo.toFullString();
+    }
+
+    public synchronized void addSubscribedURL(URL url) {
+        if (subscribedServiceURLs == null) {
+            subscribedServiceURLs = new ConcurrentSkipListMap<>();
+        }
+        addURL(subscribedServiceURLs, url);
+    }
+
+    public boolean removeSubscribedURL(URL url) {
+        if (subscribedServiceURLs == null) {
+            return true;
+        }
+        return removeURL(subscribedServiceURLs, url);
+    }
+
+    public ConcurrentNavigableMap<String, SortedSet<URL>> getSubscribedServiceURLs() {
+        return subscribedServiceURLs;
+    }
+
+    public ConcurrentNavigableMap<String, SortedSet<URL>> getExportedServiceURLs() {
+        return exportedServiceURLs;
+    }
+
+    private boolean addURL(Map<String, SortedSet<URL>> serviceURLs, URL url) {
+        SortedSet<URL> urls = serviceURLs.computeIfAbsent(url.getServiceKey(), this::newSortedURLs);
+        // make sure the parameters of tmpUrl is variable
+        return urls.add(url);
+    }
+
+    boolean removeURL(Map<String, SortedSet<URL>> serviceURLs, URL url) {
+        String key = url.getServiceKey();
+        SortedSet<URL> urls = serviceURLs.getOrDefault(key, null);
+        if (urls == null) {
+            return true;
+        }
+        boolean r = urls.remove(url);
+        // if it is empty
+        if (urls.isEmpty()) {
+            serviceURLs.remove(key);
+        }
+        return r;
+    }
+
+    private SortedSet<URL> newSortedURLs(String serviceKey) {
+        return new TreeSet<>(URLComparator.INSTANCE);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(app, services);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        }
+
+        if (!(obj instanceof MetadataInfo)) {
+            return false;
+        }
+
+        MetadataInfo other = (MetadataInfo)obj;
+
+        return Objects.equals(app, other.getApp())
+            && ((services == null && other.services == null)
+            || (services != null && services.equals(other.services)));
+    }
+
+    private void extractInstanceParams(URL url, List<MetadataParamsFilter> filters) {
+        if (CollectionUtils.isEmpty(filters)) {
+            return;
+        }
+
+        String[] included, excluded;
+        if (filters.size() == 1) {
+            MetadataParamsFilter filter = filters.get(0);
+            included = filter.instanceParamsIncluded();
+            excluded = filter.instanceParamsExcluded();
+        } else {
+            Set<String> includedList = new HashSet<>();
+            Set<String> excludedList = new HashSet<>();
+            filters.forEach(filter -> {
+                if (ArrayUtils.isNotEmpty(filter.instanceParamsIncluded())) {
+                    includedList.addAll(Arrays.asList(filter.instanceParamsIncluded()));
+                }
+                if (ArrayUtils.isNotEmpty(filter.instanceParamsExcluded())) {
+                    excludedList.addAll(Arrays.asList(filter.instanceParamsExcluded()));
+                }
+            });
+            included = includedList.toArray(new String[0]);
+            excluded = excludedList.toArray(new String[0]);
+        }
+
+        Map<String, String> tmpInstanceParams = new HashMap<>();
+        if (ArrayUtils.isNotEmpty(included)) {
+            for (String p : included) {
+                String value = url.getParameter(p);
+                if (value != null) {
+                    tmpInstanceParams.put(p, value);
+                }
+            }
+        } else if (ArrayUtils.isNotEmpty(excluded)) {
+            tmpInstanceParams.putAll(url.getParameters());
+            for (String p : excluded) {
+                tmpInstanceParams.remove(p);
+            }
+        }
+
+        tmpInstanceParams.forEach((key, value) -> {
+            String oldValue = instanceParams.put(key, value);
+            if (!TIMESTAMP_KEY.equals(key) && oldValue != null && !oldValue.equals(value)) {
+                throw new IllegalStateException(String.format("Inconsistent instance metadata found in different services: %s, %s", oldValue, value));
+            }
+        });
+    }
+
+    @Override
+    public String toString() {
+        return "metadata{" +
+            "app='" + app + "'," +
+            "revision='" + revision + "'," +
+            "size=" + (services == null ? 0 : services.size()) + "," +
+            "services=" + getSimplifiedServices(services) +
+            "}";
+    }
+
+    public String toFullString() {
+        return "metadata{" +
+            "app='" + app + "'," +
+            "revision='" + revision + "'," +
+            "services=" + services +
+            "}";
+    }
+
+    private String getSimplifiedServices(Map<String, ServiceInfo> services) {
+        if (services == null) {
+            return "[]";
+        }
+
+        return services.keySet().toString();
+    }
+
+    @Override
+    public synchronized MetadataInfo clone() {
+        return new MetadataInfo(app, revision, services, initiated, extendParams, instanceParams, updated, subscribedServiceURLs, exportedServiceURLs, loader);
+    }
+
+    private Object readResolve() {
+        // create a new object from the deserialized one, in order to call constructor
+        return new MetadataInfo(this.app, this.revision, this.services);
+    }
+
+    public static class ServiceInfo implements Serializable {
+        private String name;
+        private String group;
+        private String version;
+        private String protocol;
+        private int port = -1;
+        private String path; // most of the time, path is the same with the interface name.
+        private Map<String, String> params;
+
+        // params configured on consumer side,
+        private volatile transient Map<String, String> consumerParams;
+        // cached method params
+        private volatile transient Map<String, Map<String, String>> methodParams;
+        private volatile transient Map<String, Map<String, String>> consumerMethodParams;
+        // cached numbers
+        private volatile transient Map<String, Number> numbers;
+        private volatile transient Map<String, Map<String, Number>> methodNumbers;
+        // service + group + version
+        private volatile transient String serviceKey;
+        // service + group + version + protocol
+        private volatile transient String matchKey;
+
+        private volatile transient ProtocolServiceKey protocolServiceKey;
+
+        private transient URL url;
+
+        public ServiceInfo() {}
+
+        public ServiceInfo(URL url, List<MetadataParamsFilter> filters) {
+            this(url.getServiceInterface(), url.getGroup(), url.getVersion(), url.getProtocol(), url.getPort(), url.getPath(), null);
+            this.url = url;
+            Map<String, String> params = extractServiceParams(url, filters);
+            // initialize method params caches.
+            this.methodParams = URLParam.initMethodParameters(params);
+            this.consumerMethodParams = URLParam.initMethodParameters(consumerParams);
+        }
+
+        public ServiceInfo(String name, String group, String version, String protocol, int port, String path, Map<String, String> params) {
+            this.name = name;
+            this.group = group;
+            this.version = version;
+            this.protocol = protocol;
+            this.port = port;
+            this.path = path;
+            this.params = params == null ? new ConcurrentHashMap<>() : params;
+
+            this.serviceKey = buildServiceKey(name, group, version);
+            this.matchKey = buildMatchKey();
+        }
+
+        private Map<String, String> extractServiceParams(URL url, List<MetadataParamsFilter> filters) {
+            Map<String, String> params = new HashMap<>();
+
+            if (CollectionUtils.isEmpty(filters)) {
+                params.putAll(url.getParameters());
+                this.params = params;
+                return params;
+            }
+
+            String[] included, excluded;
+            if (filters.size() == 1) {
+                included = filters.get(0).serviceParamsIncluded();
+                excluded = filters.get(0).serviceParamsExcluded();
+            } else {
+                Set<String> includedList = new HashSet<>();
+                Set<String> excludedList = new HashSet<>();
+                for (MetadataParamsFilter filter : filters) {
+                    if (ArrayUtils.isNotEmpty(filter.serviceParamsIncluded())) {
+                        includedList.addAll(Arrays.asList(filter.serviceParamsIncluded()));
+                    }
+                    if (ArrayUtils.isNotEmpty(filter.serviceParamsExcluded())) {
+                        excludedList.addAll(Arrays.asList(filter.serviceParamsExcluded()));
+                    }
+                }
+                included = includedList.toArray(new String[0]);
+                excluded = excludedList.toArray(new String[0]);
+            }
+
+            if (ArrayUtils.isNotEmpty(included)) {
+                String[] methods = url.getParameter(METHODS_KEY, (String[]) null);
+                for (String p : included) {
+                    String value = url.getParameter(p);
+                    if (StringUtils.isNotEmpty(value) && params.get(p) == null) {
+                        params.put(p, value);
+                    }
+                    appendMethodParams(url, params, methods, p);
+                }
+            } else if (ArrayUtils.isNotEmpty(excluded)) {
+                for (Map.Entry<String, String> entry : url.getParameters().entrySet()) {
+                    String key = entry.getKey();
+                    String value = entry.getValue();
+                    boolean shouldAdd = true;
+                    for (String excludeKey : excluded) {
+                        if (key.equalsIgnoreCase(excludeKey) || key.contains("." + excludeKey)) {
+                            shouldAdd = false;
+                            break;
+                        }
+                    }
+                    if (shouldAdd) {
+                        params.put(key, value);
+                    }
+                }
+            }
+
+            this.params = params;
+            return params;
+        }
+
+        private void appendMethodParams(URL url, Map<String, String> params, String[] methods, String p) {
+            if (methods != null) {
+                for (String method : methods) {
+                    String mValue = url.getMethodParameterStrict(method, p);
+                    if (StringUtils.isNotEmpty(mValue)) {
+                        params.put(method + DOT_SEPARATOR + p, mValue);
+                    }
+                }
+            }
+        }
+
+        /**
+         * Initialize necessary caches right after deserialization on the consumer side
+         */
+        protected void init() {
+            buildMatchKey();
+            buildServiceKey(name, group, version);
+            // init method params
+            this.methodParams = URLParam.initMethodParameters(params);
+            // Actually, consumer params is empty after deserialized on the consumer side, so no need to initialize.
+            // Check how InstanceAddressURL operates on consumer url for more detail.
+//            this.consumerMethodParams = URLParam.initMethodParameters(consumerParams);
+            // no need to init numbers for it's only for cache purpose
+        }
+
+        public String getMatchKey() {
+            if (matchKey != null) {
+                return matchKey;
+            }
+            buildMatchKey();
+            return matchKey;
+        }
+
+        private String buildMatchKey() {
+            matchKey = getServiceKey();
+            if (StringUtils.isNotEmpty(protocol)) {
+                matchKey = getServiceKey() + GROUP_CHAR_SEPARATOR + protocol;
+            }
+            return matchKey;
+        }
+
+        public boolean matchProtocolServiceKey(ProtocolServiceKey protocolServiceKey) {
+            return ProtocolServiceKey.Matcher.isMatch(protocolServiceKey, getProtocolServiceKey());
+        }
+
+        public ProtocolServiceKey getProtocolServiceKey() {
+            if (protocolServiceKey != null) {
+                return protocolServiceKey;
+            }
+            protocolServiceKey = new ProtocolServiceKey(name, version, group,  protocol);
+            return protocolServiceKey;
+        }
+
+        private String buildServiceKey(String name, String group, String version) {
+            this.serviceKey = URL.buildKey(name, group, version);
+            return this.serviceKey;
+        }
+
+        public String getServiceKey() {
+            if (serviceKey != null) {
+                return serviceKey;
+            }
+            buildServiceKey(name, group, version);
+            return serviceKey;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public String getGroup() {
+            return group;
+        }
+
+        public void setGroup(String group) {
+            this.group = group;
+        }
+
+        public String getVersion() {
+            return version;
+        }
+
+        public void setVersion(String version) {
+            this.version = version;
+        }
+
+        public String getPath() {
+            return path;
+        }
+
+        public void setPath(String path) {
+            this.path = path;
+        }
+
+        public String getProtocol() {
+            return protocol;
+        }
+
+        public void setProtocol(String protocol) {
+            this.protocol = protocol;
+        }
+
+        public int getPort() {
+            return port;
+        }
+
+        public void setPort(int port) {
+            this.port = port;
+        }
+
+        public Map<String, String> getParams() {
+            if (params == null) {
+                return Collections.emptyMap();
+            }
+            return params;
+        }
+
+        public void setParams(Map<String, String> params) {
+            this.params = params;
+        }
+
+        @Transient
+        public Map<String, String> getAllParams() {
+            if (consumerParams != null) {
+                Map<String, String> allParams = new HashMap<>((int) ((params.size() + consumerParams.size()) / 0.75f + 1));
+                allParams.putAll(params);
+                allParams.putAll(consumerParams);
+                return allParams;
+            }
+            return params;
+        }
+
+        public String getParameter(String key) {
+            if (consumerParams != null) {
+                String value = consumerParams.get(key);
+                if (value != null) {
+                    return value;
+                }
+            }
+            return params.get(key);
+        }
+
+        public String getMethodParameter(String method, String key, String defaultValue) {
+            String value = getMethodParameter(method, key, consumerMethodParams);
+            if (value != null) {
+                return value;
+            }
+            value = getMethodParameter(method, key, methodParams);
+            return value == null ? defaultValue : value;
+        }
+
+        private String getMethodParameter(String method, String key, Map<String, Map<String, String>> map) {
+            String value = null;
+            if (map == null) {
+                return value;
+            }
+
+            Map<String, String> keyMap = map.get(method);
+            if (keyMap != null) {
+                value = keyMap.get(key);
+            }
+            return value;
+        }
+
+        public boolean hasMethodParameter(String method, String key) {
+            String value = this.getMethodParameter(method, key, (String) null);
+            return StringUtils.isNotEmpty(value);
+        }
+
+        public boolean hasMethodParameter(String method) {
+            return (consumerMethodParams != null && consumerMethodParams.containsKey(method))
+                || (methodParams != null && methodParams.containsKey(method));
+        }
+
+        public String toDescString() {
+            return this.getMatchKey() + port + path + new TreeMap<>(getParams());
+        }
+
+        public void addParameter(String key, String value) {
+            if (consumerParams != null) {
+                this.consumerParams.put(key, value);
+            }
+            // refresh method params
+            consumerMethodParams = URLParam.initMethodParameters(consumerParams);
+        }
+
+        public void addParameterIfAbsent(String key, String value) {
+            if (consumerParams != null) {
+                this.consumerParams.putIfAbsent(key, value);
+            }
+            // refresh method params
+            consumerMethodParams = URLParam.initMethodParameters(consumerParams);
+        }
+
+        public void addConsumerParams(Map<String, String> params) {
+            // copy once for one service subscription
+            if (consumerParams == null) {
+                consumerParams = new ConcurrentHashMap<>(params);
+                // init method params
+                consumerMethodParams = URLParam.initMethodParameters(consumerParams);
+            }
+        }
+
+        public Map<String, Number> getNumbers() {
+            // concurrent initialization is tolerant
+            if (numbers == null) {
+                numbers = new ConcurrentHashMap<>();
+            }
+            return numbers;
+        }
+
+        public Map<String, Map<String, Number>> getMethodNumbers() {
+            if (methodNumbers == null) { // concurrent initialization is tolerant
+                methodNumbers = new ConcurrentHashMap<>();
+            }
+            return methodNumbers;
+        }
+
+        public URL getUrl() {
+            return url;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (obj == null) {
+                return false;
+            }
+            if (!(obj instanceof ServiceInfo)) {
+                return false;
+            }
+
+            ServiceInfo serviceInfo = (ServiceInfo) obj;
+            /**
+             * Equals to Objects.equals(this.getMatchKey(), serviceInfo.getMatchKey()), but match key will not get initialized
+             * on json deserialization.
+             */
+            return Objects.equals(this.getVersion(), serviceInfo.getVersion())
+                && Objects.equals(this.getGroup(), serviceInfo.getGroup())
+                && Objects.equals(this.getName(), serviceInfo.getName())
+                && Objects.equals(this.getProtocol(), serviceInfo.getProtocol())
+                && Objects.equals(this.getPort(), serviceInfo.getPort())
+                && this.getParams().equals(serviceInfo.getParams());
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(getVersion(), getGroup(), getName(), getProtocol(), getPort(), getParams());
+        }
+
+        @Override
+        public String toString() {
+            return getMatchKey();
+        }
+
+        public String toFullString() {
+            return "service{" +
+                "name='" + name + "'," +
+                "group='" + group + "'," +
+                "version='" + version + "'," +
+                "protocol='" + protocol + "'," +
+                "port='" + port + "'," +
+                "params=" + params + "," +
+                "}";
+        }
+    }
+
+    static class URLComparator implements Comparator<URL> {
+
+        public static final URLComparator INSTANCE = new URLComparator();
+
+        @Override
+        public int compare(URL o1, URL o2) {
+            return o1.toFullString().compareTo(o2.toFullString());
+        }
+    }
+}