Initialization

BLB BLB

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      • Creating BLB Ordinary Instance
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    • General-purpose IPv6 BLB instance
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    • Java-SDK
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      • Initialization
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      • Overview
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    • Load Balancer Security Protection Strategy
    • Managing BLB via Terraform
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    • Using IP Group Function to Mount Real Servers Across VPCs in Different Regions
    • Using IP Group Function to Mount Real Servers Across VPCs in the Same Region
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BLB BLB

  • API Reference
    • Access control
    • API Service Domain Name
    • Appendix
    • Application BLB Interface
      • Application BLB Instance Related Interfaces
      • Application BLB Listener Related Interfaces
      • Application BLB Security Group Related Interfaces
      • Application BLB Server Group Related Interfaces
    • Application IPv6 BLB Interface
      • Application IPv6 BLB Instance Related Interfaces
      • Application IPv6 BLB Listener Related Interfaces
      • Application IPv6 BLB Security Group Related Interfaces
      • Application IPv6 BLB Server Group Related Interfaces
    • BLB Order Related Interfaces
      • BLB - Resize
      • BLB Charge Shift - Cancel Prepay to Postpay
      • BLB Charge Shift - Postpay to Prepay
      • BLB Charge Shift - Prepay to Postpay
      • BLB Inquiry
      • BLB Unsubscribe Interface
    • Document Update Records
    • Error code
    • Interface Specifications
    • Introduction
    • Load Balancer Dedicated Cluster LBDC Interface
      • LBDC Instance Related Interfaces
    • Service Publishing Point Interface
      • Service Publishing Point Related Interfaces
    • Standard BLB Interface
      • Standard BLB Instance Related Interfaces
      • Standard BLB Listener Related Interfaces
      • Standard BLB Real Server Related Interfaces
      • Standard BLB Security Group Related Interfaces
    • Standard IPv6 BLB Interface
      • Standard IPv6 BLB Related Interfaces
  • FAQs
    • Billing Problems
    • Common Questions Overview
    • Configuration-related questions
    • Fault-related questions
    • General Problems
    • Load Balancer Dedicated Cluster Related Issues
    • Performance-related questions
    • Security Problems
  • Function Release Records
  • Operation guide
    • Access control
    • Access Logs
    • Application BLB instance
    • Application IPv6 Instance
    • BLB metric description
    • Certification
    • Custom configuration
    • Extended domain name
    • General-purpose BLB instance
      • Creating BLB Ordinary Instance
      • Managing BLB Ordinary Instance
    • General-purpose IPv6 BLB instance
    • Identity and access management
    • IP Group Usage Guide
    • Load Balance Dedicated Cluster
    • Load Balancer Frontend and Backend Protocol Correspondence
    • Recording Access Logs Using VPC Flow Logs
    • Service Release Point
    • Tag Management
  • Product Description
    • Application scenarios
    • Basic Architecture
    • Basic concepts
    • Performance Specification Description
    • Product advantages
    • Product features
    • Product Introduction
    • Usage restrictions
  • Product pricing
    • Load Balancer Dedicated Cluster Billing
    • Load Balancer Instance Billing
  • Quick Start
  • SDK
    • GO-SDK
      • Application BLB Instance
      • Initialization
      • Install
      • IPv6 BLB Instance
      • Load Balance Dedicated Cluster (LBDC)
      • Ordinary BLB Instance
      • Overview
      • Service Release Point
      • Version Change Records
    • Java-SDK
      • Application BLB instance
      • General-purpose BLB instance
      • Initialization
      • Install the SDK Package
      • IPv6 BLB Instance
      • Load Balance Dedicated Cluster (LBDC)
      • Overview
      • Service Release Point
      • Version Update Description
    • PHP-SDK
      • Initialization
      • Install
      • Ordinary BLB Instance
      • Overview
    • Python-SDK
      • Application BLB Instance
      • Initialization
      • Install
      • IPv6 BLB Instance
      • Load Balance Dedicated Cluster (LBDC)
      • Ordinary BLB Instance
      • Overview
      • Service Release Point
      • Version Update Description
  • Service Level Agreement (SLA)
    • Description of Baidu AI Cloud Load Balancer Trusted Cloud certification service availability
    • LBDC Service Level Agreement SLA
    • BLB Service Level Agreement (V2.0)
  • Typical Practices
    • BLB Selection Guide
    • Health Check Exception Troubleshooting
    • Implementing BLB Association with Listeners, Real Servers, Security Groups, etc. via Terraform
    • Implementing Multi-Site Hosting via Application BLB
    • Load Balancer Security Protection Strategy
    • Managing BLB via Terraform
    • Obtaining Client Information via Application BLB Instance
    • Using IP Group Function to Mount Real Servers Across VPCs in Different Regions
    • Using IP Group Function to Mount Real Servers Across VPCs in the Same Region
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  • Initialization
Table of contents on this page
  • Confirm Endpoint
  • Create a BlbClient
  • Create a BlbClient with AK/SK
  • Set network parameters

Initialization

Updated at:2025-10-16

BlbClient functions as the Java client for BLB services, enabling the management of BLB resources. To initiate BLB requests using the Java SDK, you need to instantiate a BlbClient and adjust the default ConfigMap settings in the BlbClientConfiguration as needed.

Confirm Endpoint

Before configuring the Endpoint for SDK usage, please refer to the developer guide section on BLB Access Domain Name to understand Endpoint-related concepts. Baidu AI Cloud currently supports multiple regions. Please refer to Region Selection Guide.

Currently, supported regions include "Beijing," "Guangzhou," "Suzhou," "Hong Kong," "Wuhan," "Baoding," "Shanghai," and "Singapore.\

The corresponding information for the service domain name:

Access region Endpoint
bj blb.bj.baidubce.com
gz blb.gz.baidubce.com
su blb.su.baidubce.com
hkg blb.hkg.baidubce.com
fwh blb.fwh.baidubce.com
bd blb.bd.baidubce.com
fsh blb.fsh.baidubce.com
sin blb.sin.baidubce.com

Create a BlbClient

Create a BlbClient with AK/SK

Users can refer to the following code to create a BlbClient to access BLB with AK/SK:

Plain Text
1public class Sample {
2public static void main(String[] args) {
3 String ACCESS_KEY_ID =<your-access-key-id>;                   // User’s Access Key ID
4 String SECRET_ACCESS_KEY =<your-secret-access-key>;           // User’s Secret Access Key
5        
6 // Initialize a BlbClient
7    BlbClientConfiguration config = new BlbClientConfiguration();
8    config.setCredentials(new DefaultBceCredentials(ACCESS_KEY_ID, SECRET_ACCESS_KEY));
9    BlbClient client = new BlbClient(config);
10    }
11}

In the code above, ACCESS_KEY_ID corresponds to “Access Key ID” in the console. SECRET_ACCESS_KEY corresponds to “Access Key Secret” in the console. For the method to retrieve them, refer to the Guide - Manage ACCESSKEY.

By default, the above method assigns the default domain as BLB’s service address. However, to specify a custom domain name, you need to include the ENDPOINT parameter.

Java
1String ACCESS_KEY_ID =<your-access-key-id>;                   // User’s Access Key ID
2 String SECRET_ACCESS_KEY =<your-secret-access-key>;           // User’s Secret Access Key
3 String ENDPOINT = <domain-name>;                               // User-defined domain name
4BlbClientConfiguration config = new BlbClientConfiguration();
5config.setCredentials(new DefaultBceCredentials(ACCESS_KEY_ID,SECRET_ACCESS_KEY));
6config.setEndpoint(ENDPOINT);
7BlbClient client = new BlbClient(config);

Note:The ENDPOINT parameter must use region-specific domain names (e.g., http://aihc.bj.baidubce.com for Beijing). If unspecified, it defaults to the Beijing regionhttp://blb.bj.baidubce.com.

Set network parameters

Users may set the basic network parameters with BlbClientConfiguration:

Plain Text
1BlbClientConfiguration config = new BlbClientConfiguration();
2    
3 // Set maximum number of HTTP connections to 10
4config.setMaxConnections(10);
5    
6 // Set TCP connection timeout to 5,000 milliseconds
7config.setConnectionTimeout(5000);
8    
9 // Set timeout for Socket data transmission to 2,000 milliseconds
10config.setSocketTimeout(2000);

Parameter description

The following parameters can be configured via BlbClientConfiguration:

Parameters Description
UserAgent User agent, refers to HTTP’s User-Agent header
Protocol Connection protocol type
ProxyDomain Windows domain for NTLM-verified proxy
ProxyHost Proxy server host address
ProxyPort Proxy server port
ProxyUsername Proxy verification username
ProxyPassword Proxy verification password
ProxyPreemptiveAuthenticationEnabled Enable user agent verification or not
ProxyWorkstation NTLM proxy workstation name
LocalAddress Local address
ConnectionTimeoutInMillis Timeout for establishing TCP connections (unit: ms)
SocketTimeoutInMillis Timeout for socket data transmission (unit: ms)
MaxConnections Maximum allowable HTTP connections
RetryPolicy Retry policy for connections
SocketBufferSizeInBytes Buffer size for socket operations
StreamBufferSize Stream file buffer size

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