Fetch Topic list

OnsTopicList interface returns a list of all Topics of the current user.

Scenario

This interface returns a list of all Topics in the account, and is usually used for generating a list of resources instead of viewing detailed information.

Request parameters

Response parameters

PublishInfoDo data structure

Related APIs

• OnsTopicCreate: creates a Topic
• OnsTopicList: views the list of Topics
• OnsPublishDelete: deletes a publish relation
• OnsSubscribeDelete: deletes a subscription relation

Example

As a reference, this example shows the process of accessing from the end point China East, and querying the list of all Topics of the current user.

public static void main (String[]args) {
        String regionId = "cn-hangzhou";
        String accessKey = "XXXXXXXXXXXXXXXXX";
        String secretKey = "XXXXXXXXXXXXXXXXX";
        String endPointName ="cn-hangzhou";
        String productName ="Ons";
        String domain ="ons.cn-hangzhou.aliyuncs.com";
        /**
        *Select Region based on the region you will access, and set the corresponding access point.
        */
        try {
            DefaultProfile.addEndpoint(endPointName，regionId，productName，domain);
        } catch (ClientException e) {
            e.printStackTrace();
        }
        IClientProfile profile = DefaultProfile.getProfile(regionId，accessKey，secretKey);
        IAcsClient IAcsClient = new DefaultAcsClient(profile);
        OnsTopicListRequest request = new OnsTopicListRequest();
            /**
            *OnsRegionId refers to the resource of the region of MQ required to be accessed by API.
            *This value must be selected and configured by the list obtained through the OnsRegionList method because OnsRegionId is changing, and cannot be written as a fixed value.
            */
        request.setOnsRegionId("daily");
        request.setPreventCache(System.currentTimeMillis());
        request.setTopic("XXXXXXXXXXXXX");
        try {
            OnsTopicListResponse response = IAcsClient.getAcsResponse(request);
            List<OnsTopicListResponse.PublishInfoDo> publishInfoDoList=response.getData();
            for(OnsTopicListResponse.PublishInfoDo publishInfoDo:publishInfoDoList){
                System.out.println(publishInfoDo.getTopic()+"     "+ publishInfoDo.getOwner());
            }
        } catch (ServerException e) {
            e.printStackTrace();
        } catch (ClientException e) {
            e.printStackTrace();
        }
    }