[ISSUE #12925] Optimize configuration history comparison and rollback.

config/src/main/java/com/alibaba/nacos/config/server/controller/HistoryController.java

@@ -21,6 +21,7 @@
 import com.alibaba.nacos.common.utils.StringUtils;
 import com.alibaba.nacos.config.server.constant.Constants;
 import com.alibaba.nacos.config.server.model.ConfigHistoryInfo;
+import com.alibaba.nacos.config.server.model.ConfigHistoryInfoPair;
 import com.alibaba.nacos.config.server.model.ConfigInfoWrapper;
 import com.alibaba.nacos.config.server.paramcheck.ConfigDefaultHttpParamExtractor;
 import com.alibaba.nacos.core.paramcheck.ExtractorManager;
@@ -100,6 +101,25 @@ public ConfigHistoryInfo getConfigHistoryInfo(@RequestParam("dataId") String dat
             @RequestParam("nid") Long nid) throws AccessException {
         return historyService.getConfigHistoryInfo(dataId, group, tenant, nid);
     }
+
+    /**
+     * Query the detailed configuration history information pair, including the original version and the updated version. notes:
+     *
+     * @param nid    history_config_info nid
+     * @param dataId dataId  @since 2.0.3
+     * @param group  groupId  @since 2.0.3
+     * @param tenant tenantId  @since 2.0.3
+     * @return history config info
+     * @since 2.0.3 add {@link Secured}, dataId, groupId and tenant for history config permission check.
+     */
+    @GetMapping(value = "/pair")
+    @Secured(action = ActionTypes.READ, signType = SignType.CONFIG)
+    public ConfigHistoryInfoPair getConfigHistoryInfoPair(@RequestParam("dataId") String dataId,
+            @RequestParam("group") String group,
+            @RequestParam(value = "tenant", required = false, defaultValue = StringUtils.EMPTY) String tenant,
+            @RequestParam(value = "nid") Long nid) throws AccessException {
+        return historyService.getConfigHistoryInfoPair(dataId, group, tenant, nid);
+    }
 
     /**
      * Query previous config history information. notes:

config/src/main/java/com/alibaba/nacos/config/server/enums/OperationType.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.nacos.config.server.enums;
+
+/**
+ * Operation type enum.
+ *
+ * @author dirtybit
+ */
+public enum OperationType {
+
+    /**
+     * Insert.
+     */
+    INSERT("I"),
+
+    /**
+     * Update.
+     */
+    UPDATE("U"),
+
+    /**
+     * Delete.
+     */
+    DELETE("D");
+
+    /**
+     * operation type value.
+     */
+    private String value;
+
+    OperationType(String value) {
+        this.value = value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+
+    public String getValue() {
+        return this.value;
+    }
+
+}

config/src/main/java/com/alibaba/nacos/config/server/model/ConfigHistoryInfoPair.java

@@ -0,0 +1,253 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * 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.alibaba.nacos.config.server.model;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
+
+import java.io.Serializable;
+import java.sql.Timestamp;
+import java.util.Objects;
+
+/**
+ * ConfigHistoryInfoPair.
+ *
+ * @author dirtybit
+ */
+public class ConfigHistoryInfoPair implements Serializable {
+
+    private static final long serialVersionUID = -7827521105376245603L;
+
+    @JsonSerialize(using = ToStringSerializer.class)
+    private long id;
+
+    private long lastId = -1;
+
+    private String dataId;
+
+    private String group;
+
+    private String tenant;
+
+    private String appName;
+
+    private String md5;
+
+    private String content;
+
+    private String updatedMd5;
+
+    private String updatedContent;
+
+    private String srcIp;
+
+    private String srcUser;
+
+    /**
+     * Operation type, include inserting, updating and deleting.
+     */
+    private String opType;
+
+    private String publishType;
+
+    private String grayName;
+
+    private String extInfo;
+
+    private Timestamp createdTime;
+
+    private Timestamp lastModifiedTime;
+
+    private String encryptedDataKey;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public long getLastId() {
+        return lastId;
+    }
+
+    public void setLastId(long lastId) {
+        this.lastId = lastId;
+    }
+
+    public String getDataId() {
+        return dataId;
+    }
+
+    public void setDataId(String dataId) {
+        this.dataId = dataId;
+    }
+
+    public String getGroup() {
+        return group;
+    }
+
+    public void setGroup(String group) {
+        this.group = group;
+    }
+
+    public String getTenant() {
+        return tenant;
+    }
+
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public String getUpdatedMd5() {
+        return updatedMd5;
+    }
+
+    public void setUpdatedMd5(String updatedMd5) {
+        this.updatedMd5 = updatedMd5;
+    }
+
+    public String getUpdatedContent() {
+        return updatedContent;
+    }
+
+    public void setUpdatedContent(String updatedContent) {
+        this.updatedContent = updatedContent;
+    }
+
+    public String getSrcIp() {
+        return srcIp;
+    }
+
+    public void setSrcIp(String srcIp) {
+        this.srcIp = srcIp;
+    }
+
+    public String getSrcUser() {
+        return srcUser;
+    }
+
+    public void setSrcUser(String srcUser) {
+        this.srcUser = srcUser;
+    }
+
+    public String getOpType() {
+        return opType;
+    }
+
+    public void setOpType(String opType) {
+        this.opType = opType;
+    }
+
+    public String getPublishType() {
+        return publishType;
+    }
+
+    public void setPublishType(String publishType) {
+        this.publishType = publishType;
+    }
+
+    public String getExtInfo() {
+        return extInfo;
+    }
+
+    public void setExtInfo(String extInfo) {
+        this.extInfo = extInfo;
+    }
+
+    public Timestamp getCreatedTime() {
+        return new Timestamp(createdTime.getTime());
+    }
+
+    public void setCreatedTime(Timestamp createdTime) {
+        this.createdTime = new Timestamp(createdTime.getTime());
+    }
+
+    public Timestamp getLastModifiedTime() {
+        return new Timestamp(lastModifiedTime.getTime());
+    }
+
+    public void setLastModifiedTime(Timestamp lastModifiedTime) {
+        this.lastModifiedTime = new Timestamp(lastModifiedTime.getTime());
+    }
+
+    public String getGrayName() {
+        return grayName;
+    }
+
+    public void setGrayName(String grayName) {
+        this.grayName = grayName;
+    }
+
+    public String getAppName() {
+        return appName;
+    }
+
+    public void setAppName(String appName) {
+        this.appName = appName;
+    }
+
+    public String getMd5() {
+        return md5;
+    }
+
+    public void setMd5(String md5) {
+        this.md5 = md5;
+    }
+
+    public String getEncryptedDataKey() {
+        return encryptedDataKey;
+    }
+
+    public void setEncryptedDataKey(String encryptedDataKey) {
+        this.encryptedDataKey = encryptedDataKey;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ConfigHistoryInfoPair that = (ConfigHistoryInfoPair) o;
+        return id == that.id && lastId == that.lastId && Objects.equals(dataId, that.dataId) && Objects.equals(group,
+                that.group) && Objects.equals(tenant, that.tenant) && Objects.equals(appName, that.appName)
+                && Objects.equals(md5, that.md5) && Objects.equals(content, that.content) && Objects.equals(updatedMd5,
+                that.updatedMd5) && Objects.equals(updatedContent, that.updatedContent) && Objects.equals(srcIp,
+                that.srcIp) && Objects.equals(srcUser, that.srcUser) && Objects.equals(opType, that.opType)
+                && Objects.equals(createdTime, that.createdTime) && Objects.equals(lastModifiedTime,
+                that.lastModifiedTime) && Objects.equals(encryptedDataKey, that.encryptedDataKey);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, lastId, dataId, group, tenant, appName, md5, content, updatedMd5, updatedContent, srcIp,
+                srcUser, opType, createdTime, lastModifiedTime, encryptedDataKey);
+    }
+
+}