[TDR List Table][Java SDK] Insert an Element to a Specified Position in a List

1. Interface Description

Insert new data after a specified position of a list for a specified Key in a table.

2. Version Requirements

This interface is provided in all versions without special requirements.

3. Preparations

Refer to Preparation document to complete the preparation before using this interface and create the following TDR List table.

Get the following information after the preparation. These details will be used by the SDK:

1. Directory server address list
2. App ID
3. App access password
4. Game zone ID
5. Table name

4. Example Code

Basic execution process of example code:

1. Create a client;
2. Create a request;
3. Send a request;
4. Process the response;
5. Destroy the client.

4.1 Example Code for Synchronous Call

import com.tencent.tcaplus.client.Client;
import com.tencent.tcaplus.client.ClientFactory;
import com.tencent.tcaplus.client.Record;
import com.tencent.tcaplus.client.Request;
import com.tencent.tcaplus.client.Response;
import com.tencent.tdr.tcaplus_protocol_cs.TcaplusProtocolCsConstants;

import java.util.ArrayList;
import java.util.List;

public class Example {

    public static void main(String[] arguments) {
        // 1. Prepare the environment information
        // 1.1. Directory server address list
        List<String> dirList = new ArrayList<String>();
        dirList.add("tcp://x.x.x.x:9999");
        dirList.add("tcp://y.y.y.y:9999");
        // 1.2. App ID
        int appId = 1;
        // 1.3. App password
        String appPassword = "****************";
        // 1.4. Table group ID
        int tableGroupId = 1;
        // 1.5. Table name
        String tableName = "test";

        // 2. Create a client
        Client client = ClientFactory.createClient(appId, tableGroupId, appPassword, dirList);
        try {
            // 3. Construct a request to insert data
            // 3.1. Get the request object. In order to improve the SDK's performance, the Request object is reused
            Request request = client.acquireRequest();
            // 3.2. Set the request type and target table name. Note: The target table must be a List table
            request.setCmd(TcaplusProtocolCsConstants.TCAPLUS_CMD_LIST_ADDAFTER_REQ);
            request.setTableName(tableName);
            // 3.3. Specify where to insert the new data into the list
                  //      In this sample, -1 means to insert at the end of the list. If it is 0, it means to insert after the first data in the list, and so on
            Record record = request.addRecord(-1);
            // 3.4. Set the values of each field of the data. Note: The Key field and the Value field are set in different ways
            record.setKeyInt("gameid", 1);
            record.setKeyInt("itemid", 1);
            record.setKeyString("name", "test");
            record.setValueByte("typeid", (byte) 1);
            record.setValueByte("Data", (byte) 1);
            record.setValueString("uname", "test");

            // 4. Send a request and get the result
            Response response = client.poll(request);

            // 5. Process the result
            if (response.getResult() == 0) {
                // Data insert successful
                // TODO: add the code to process the result of data insert successful here
            } else {
                // Data insert failure
                // TODO: add the code to process the result of data insert failure here
            }
        } finally {
            // 6. Destroy the client object
            ClientFactory.destroyClient(client);
        }
    }

}

4.2 Example Code for Asynchronous Call

import com.tencent.tcaplus.client.Client;
import com.tencent.tcaplus.client.ClientFactory;
import com.tencent.tcaplus.client.Record;
import com.tencent.tcaplus.client.Request;
import com.tencent.tcaplus.client.Response;
import com.tencent.tdr.tcaplus_protocol_cs.TcaplusProtocolCsConstants;

import java.util.ArrayList;
import java.util.List;

public class Example {

    public static void main(String[] arguments) {
        // 1. Prepare the environment information
        // 1.1. Directory server address list
        List<String> dirList = new ArrayList<String>();
        dirList.add("tcp://x.x.x.x:9999");
        dirList.add("tcp://y.y.y.y:9999");
        // 1.2. App ID
        int appId = 1;
        // 1.3. App password
        String appPassword = "****************";
        // 1.4. Table group ID
        int tableGroupId = 1;
        // 1.5. Table name
        String tableName = "test";

        // 2. Create a client
        Client client = ClientFactory.createClient(appId, tableGroupId, appPassword, dirList);
        try {
            // 3. Construct a request to insert data
            // 3.1. Get the request object. In order to improve the SDK's performance, the Request object is reused
            Request request = client.acquireRequest();
            // 3.2. Set the request type and target table name. Note: The target table must be a List table
            request.setCmd(TcaplusProtocolCsConstants.TCAPLUS_CMD_LIST_ADDAFTER_REQ);
            request.setTableName(tableName);
            // 3.3. Specify where to insert the new data into the list
                  //      In this sample, -1 means to insert at the end of the list. If it is 0, it means to insert after the first data in the list, and so on
            Record record = request.addRecord(-1);
            // 3.4. Set the values of each field of the data. Note: The Key field and the Value field are set in different ways
            record.setKeyInt("gameid", 1);
            record.setKeyInt("itemid", 1);
            record.setKeyString("name", "test");
            record.setValueByte("typeid", (byte) 1);
            record.setValueByte("Data", (byte) 1);
            record.setValueString("uname", "test");

            CountDownLatch latch = new CountDownLatch(1);

            // 4. Send the request asynchronously and specify the processor that returns the response. The post method will return the result immediately
            client.post(request, new Future() {

                @Override
                public void onResponse(Response response) {
                    // 5. Process the response
                    if (response.getResult() == 0) {
                        // Data getting success
                        // TODO: add the subsequent processing code of successful data getting here
                    } else {
                        // Data getting failure
                        // TODO: add the subsequent processing code of failed data getting here
                    }
                }

            });

            latch.await();
        } finally {
            // 6. Destroy the client object
            ClientFactory.destroyClient(client);
        }
    }

}

5. Method Description in Request Object

Note: If there is an unlisted Request object method, it means that the method is invalid in the scenario of inserting data.

5.1. Method Description in Request Data Object

Note: If there is an unlisted Record object method, it means that the method is invalid in the scenario of inserting data.

6. Method Description in Response Object

Note: If there is an unlisted Reponse object method, it means that the method is invalid in the scenario of inserting data.

7. FAQ

For details, see Meaning and Handling of Error Codes.

8. Other Reference Documents

[TDR List Table][C++ SDK] Interface Description for Inserting an Element into a Specified Position in a List

[TDR List Table] [Go SDK] Interface Description for Inserting an Element into a Specified Position in a List