Class AbstractAmazonElasticLoadBalancing
- All Implemented Interfaces:
AmazonElasticLoadBalancing
- Direct Known Subclasses:
AbstractAmazonElasticLoadBalancingAsync
AmazonElasticLoadBalancing
. Convenient
method forms pass through to the corresponding overload that takes a request
object, which throws an UnsupportedOperationException
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionaddTags
(AddTagsRequest request) Adds the specified tags to the specified load balancer.Associates one or more security groups with your load balancer in a virtual private cloud (VPC).Adds one or more subnets to the set of configured subnets for the specified load balancer.Specifies the health check settings to use when evaluating the health state of your back-end instances.Generates a stickiness policy with sticky session lifetimes that follow that of an application-generated cookie.Generates a stickiness policy with sticky session lifetimes controlled by the lifetime of the browser (user-agent) or a specified expiration period.Creates a load balancer.Creates one or more listeners for the specified load balancer.Creates a policy with the specified attributes for the specified load balancer.Deletes the specified load balancer.Deletes the specified listeners from the specified load balancer.Deletes the specified policy from the specified load balancer.Deregisters the specified instances from the specified load balancer.Describes the state of the specified instances with respect to the specified load balancer.Describes the attributes for the specified load balancer.Simplified method form for invoking the DescribeLoadBalancerPolicies operation.Describes the specified policies.Simplified method form for invoking the DescribeLoadBalancerPolicyTypes operation.Describes the specified load balancer policy types.Simplified method form for invoking the DescribeLoadBalancers operation.Describes the specified the load balancers.describeTags
(DescribeTagsRequest request) Describes the tags associated with the specified load balancers.Removes the specified subnets from the set of configured subnets for the load balancer.Removes the specified Availability Zones from the set of Availability Zones for the specified load balancer.Adds the specified Availability Zones to the set of Availability Zones for the specified load balancer.Returns additional metadata for a previously executed successful request, typically used for debugging issues where a service isn't acting as expected.Modifies the attributes of the specified load balancer.Adds the specified instances to the specified load balancer.removeTags
(RemoveTagsRequest request) Removes one or more tags from the specified load balancer.void
setEndpoint
(String endpoint) Overrides the default endpoint for this client ("elasticloadbalancing.amazonaws.com").Sets the certificate that terminates the specified listener's SSL connections.Replaces the set of policies associated with the specified port on which the back-end server is listening with a new set of policies.Associates, updates, or disables a policy with a listener for the specified load balancer.void
An alternative toAmazonElasticLoadBalancing.setEndpoint(String)
, sets the regional endpoint for this client's service calls.void
shutdown()
Shuts down this client object, releasing any resources that might be held open.
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Constructor Details
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AbstractAmazonElasticLoadBalancing
protected AbstractAmazonElasticLoadBalancing()
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Method Details
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setEndpoint
Description copied from interface:AmazonElasticLoadBalancing
Overrides the default endpoint for this client ("elasticloadbalancing.amazonaws.com"). Callers can use this method to control which AWS region they want to work with.Callers can pass in just the endpoint (ex: "elasticloadbalancing.amazonaws.com") or a full URL, including the protocol (ex: "elasticloadbalancing.amazonaws.com"). If the protocol is not specified here, the default protocol from this client's
ClientConfiguration
will be used, which by default is HTTPS.For more information on using AWS regions with the AWS SDK for Java, and a complete list of all available endpoints for all AWS services, see: http://developer.amazonwebservices.com/connect/entry.jspa?externalID= 3912
This method is not threadsafe. An endpoint should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
- Specified by:
setEndpoint
in interfaceAmazonElasticLoadBalancing
- Parameters:
endpoint
- The endpoint (ex: "elasticloadbalancing.amazonaws.com") or a full URL, including the protocol (ex: "elasticloadbalancing.amazonaws.com") of the region specific AWS endpoint this client will communicate with.
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setRegion
Description copied from interface:AmazonElasticLoadBalancing
An alternative toAmazonElasticLoadBalancing.setEndpoint(String)
, sets the regional endpoint for this client's service calls. Callers can use this method to control which AWS region they want to work with.By default, all service endpoints in all regions use the https protocol. To use http instead, specify it in the
ClientConfiguration
supplied at construction.This method is not threadsafe. A region should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
- Specified by:
setRegion
in interfaceAmazonElasticLoadBalancing
- Parameters:
region
- The region this client will communicate with. SeeRegion.getRegion(com.amazonaws.regions.Regions)
for accessing a given region. Must not be null and must be a region where the service is available.- See Also:
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addTags
Description copied from interface:AmazonElasticLoadBalancing
Adds the specified tags to the specified load balancer. Each load balancer can have a maximum of 10 tags.
Each tag consists of a key and an optional value. If a tag with the same key is already associated with the load balancer,
AddTags
updates its value.For more information, see Tag Your Load Balancer in the Elastic Load Balancing Developer Guide.
- Specified by:
addTags
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the AddTags operation returned by the service.
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applySecurityGroupsToLoadBalancer
public ApplySecurityGroupsToLoadBalancerResult applySecurityGroupsToLoadBalancer(ApplySecurityGroupsToLoadBalancerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Associates one or more security groups with your load balancer in a virtual private cloud (VPC). The specified security groups override the previously associated security groups.
For more information, see Security Groups for Load Balancers in a VPC in the Elastic Load Balancing Developer Guide.
- Specified by:
applySecurityGroupsToLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the ApplySecurityGroupsToLoadBalancer operation returned by the service.
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attachLoadBalancerToSubnets
public AttachLoadBalancerToSubnetsResult attachLoadBalancerToSubnets(AttachLoadBalancerToSubnetsRequest request) Description copied from interface:AmazonElasticLoadBalancing
Adds one or more subnets to the set of configured subnets for the specified load balancer.
The load balancer evenly distributes requests across all registered subnets. For more information, see Add or Remove Subnets for Your Load Balancer in a VPC in the Elastic Load Balancing Developer Guide.
- Specified by:
attachLoadBalancerToSubnets
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the AttachLoadBalancerToSubnets operation returned by the service.
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configureHealthCheck
Description copied from interface:AmazonElasticLoadBalancing
Specifies the health check settings to use when evaluating the health state of your back-end instances.
For more information, see Configure Health Checks in the Elastic Load Balancing Developer Guide.
- Specified by:
configureHealthCheck
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the ConfigureHealthCheck operation returned by the service.
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createAppCookieStickinessPolicy
public CreateAppCookieStickinessPolicyResult createAppCookieStickinessPolicy(CreateAppCookieStickinessPolicyRequest request) Description copied from interface:AmazonElasticLoadBalancing
Generates a stickiness policy with sticky session lifetimes that follow that of an application-generated cookie. This policy can be associated only with HTTP/HTTPS listeners.
This policy is similar to the policy created by CreateLBCookieStickinessPolicy, except that the lifetime of the special Elastic Load Balancing cookie,
AWSELB
, follows the lifetime of the application-generated cookie specified in the policy configuration. The load balancer only inserts a new stickiness cookie when the application response includes a new application cookie.If the application cookie is explicitly removed or expires, the session stops being sticky until a new application cookie is issued.
For more information, see Application-Controlled Session Stickiness in the Elastic Load Balancing Developer Guide.
- Specified by:
createAppCookieStickinessPolicy
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the CreateAppCookieStickinessPolicy operation returned by the service.
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createLBCookieStickinessPolicy
public CreateLBCookieStickinessPolicyResult createLBCookieStickinessPolicy(CreateLBCookieStickinessPolicyRequest request) Description copied from interface:AmazonElasticLoadBalancing
Generates a stickiness policy with sticky session lifetimes controlled by the lifetime of the browser (user-agent) or a specified expiration period. This policy can be associated only with HTTP/HTTPS listeners.
When a load balancer implements this policy, the load balancer uses a special cookie to track the back-end server instance for each request. When the load balancer receives a request, it first checks to see if this cookie is present in the request. If so, the load balancer sends the request to the application server specified in the cookie. If not, the load balancer sends the request to a server that is chosen based on the existing load-balancing algorithm.
A cookie is inserted into the response for binding subsequent requests from the same user to that server. The validity of the cookie is based on the cookie expiration time, which is specified in the policy configuration.
For more information, see Duration-Based Session Stickiness in the Elastic Load Balancing Developer Guide.
- Specified by:
createLBCookieStickinessPolicy
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the CreateLBCookieStickinessPolicy operation returned by the service.
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createLoadBalancer
Description copied from interface:AmazonElasticLoadBalancing
Creates a load balancer.
If the call completes successfully, a new load balancer is created with a unique Domain Name Service (DNS) name. The load balancer receives incoming traffic and routes it to the registered instances. For more information, see How Elastic Load Balancing Works in the Elastic Load Balancing Developer Guide.
You can create up to 20 load balancers per region per account. You can request an increase for the number of load balancers for your account. For more information, see Elastic Load Balancing Limits in the Elastic Load Balancing Developer Guide.
- Specified by:
createLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the CreateLoadBalancer operation returned by the service.
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createLoadBalancerListeners
public CreateLoadBalancerListenersResult createLoadBalancerListeners(CreateLoadBalancerListenersRequest request) Description copied from interface:AmazonElasticLoadBalancing
Creates one or more listeners for the specified load balancer. If a listener with the specified port does not already exist, it is created; otherwise, the properties of the new listener must match the properties of the existing listener.
For more information, see Add a Listener to Your Load Balancer in the Elastic Load Balancing Developer Guide.
- Specified by:
createLoadBalancerListeners
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the CreateLoadBalancerListeners operation returned by the service.
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createLoadBalancerPolicy
public CreateLoadBalancerPolicyResult createLoadBalancerPolicy(CreateLoadBalancerPolicyRequest request) Description copied from interface:AmazonElasticLoadBalancing
Creates a policy with the specified attributes for the specified load balancer.
Policies are settings that are saved for your load balancer and that can be applied to the front-end listener or the back-end application server, depending on the policy type.
- Specified by:
createLoadBalancerPolicy
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the CreateLoadBalancerPolicy operation returned by the service.
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deleteLoadBalancer
Description copied from interface:AmazonElasticLoadBalancing
Deletes the specified load balancer.
If you are attempting to recreate a load balancer, you must reconfigure all settings. The DNS name associated with a deleted load balancer are no longer usable. The name and associated DNS record of the deleted load balancer no longer exist and traffic sent to any of its IP addresses is no longer delivered to back-end instances.
If the load balancer does not exist or has already been deleted, the call to
DeleteLoadBalancer
still succeeds.- Specified by:
deleteLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DeleteLoadBalancer operation returned by the service.
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deleteLoadBalancerListeners
public DeleteLoadBalancerListenersResult deleteLoadBalancerListeners(DeleteLoadBalancerListenersRequest request) Description copied from interface:AmazonElasticLoadBalancing
Deletes the specified listeners from the specified load balancer.
- Specified by:
deleteLoadBalancerListeners
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DeleteLoadBalancerListeners operation returned by the service.
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deleteLoadBalancerPolicy
public DeleteLoadBalancerPolicyResult deleteLoadBalancerPolicy(DeleteLoadBalancerPolicyRequest request) Description copied from interface:AmazonElasticLoadBalancing
Deletes the specified policy from the specified load balancer. This policy must not be enabled for any listeners.
- Specified by:
deleteLoadBalancerPolicy
in interfaceAmazonElasticLoadBalancing
- Parameters:
request
- =- Returns:
- Result of the DeleteLoadBalancerPolicy operation returned by the service.
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deregisterInstancesFromLoadBalancer
public DeregisterInstancesFromLoadBalancerResult deregisterInstancesFromLoadBalancer(DeregisterInstancesFromLoadBalancerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Deregisters the specified instances from the specified load balancer. After the instance is deregistered, it no longer receives traffic from the load balancer.
You can use DescribeLoadBalancers to verify that the instance is deregistered from the load balancer.
For more information, see Deregister and Register Amazon EC2 Instances in the Elastic Load Balancing Developer Guide.
- Specified by:
deregisterInstancesFromLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DeregisterInstancesFromLoadBalancer operation returned by the service.
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describeInstanceHealth
Description copied from interface:AmazonElasticLoadBalancing
Describes the state of the specified instances with respect to the specified load balancer. If no instances are specified, the call describes the state of all instances that are currently registered with the load balancer. If instances are specified, their state is returned even if they are no longer registered with the load balancer. The state of terminated instances is not returned.
- Specified by:
describeInstanceHealth
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DescribeInstanceHealth operation returned by the service.
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describeLoadBalancerAttributes
public DescribeLoadBalancerAttributesResult describeLoadBalancerAttributes(DescribeLoadBalancerAttributesRequest request) Description copied from interface:AmazonElasticLoadBalancing
Describes the attributes for the specified load balancer.
- Specified by:
describeLoadBalancerAttributes
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DescribeLoadBalancerAttributes operation returned by the service.
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describeLoadBalancerPolicies
public DescribeLoadBalancerPoliciesResult describeLoadBalancerPolicies(DescribeLoadBalancerPoliciesRequest request) Description copied from interface:AmazonElasticLoadBalancing
Describes the specified policies.
If you specify a load balancer name, the action returns the descriptions of all policies created for the load balancer. If you specify a policy name associated with your load balancer, the action returns the description of that policy. If you don't specify a load balancer name, the action returns descriptions of the specified sample policies, or descriptions of all sample policies. The names of the sample policies have the
ELBSample-
prefix.- Specified by:
describeLoadBalancerPolicies
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DescribeLoadBalancerPolicies operation returned by the service.
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describeLoadBalancerPolicies
Description copied from interface:AmazonElasticLoadBalancing
Simplified method form for invoking the DescribeLoadBalancerPolicies operation.- Specified by:
describeLoadBalancerPolicies
in interfaceAmazonElasticLoadBalancing
- See Also:
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describeLoadBalancerPolicyTypes
public DescribeLoadBalancerPolicyTypesResult describeLoadBalancerPolicyTypes(DescribeLoadBalancerPolicyTypesRequest request) Description copied from interface:AmazonElasticLoadBalancing
Describes the specified load balancer policy types.
You can use these policy types with CreateLoadBalancerPolicy to create policy configurations for a load balancer.
- Specified by:
describeLoadBalancerPolicyTypes
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DescribeLoadBalancerPolicyTypes operation returned by the service.
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describeLoadBalancerPolicyTypes
Description copied from interface:AmazonElasticLoadBalancing
Simplified method form for invoking the DescribeLoadBalancerPolicyTypes operation.- Specified by:
describeLoadBalancerPolicyTypes
in interfaceAmazonElasticLoadBalancing
- See Also:
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describeLoadBalancers
Description copied from interface:AmazonElasticLoadBalancing
Describes the specified the load balancers. If no load balancers are specified, the call describes all of your load balancers.
- Specified by:
describeLoadBalancers
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DescribeLoadBalancers operation returned by the service.
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describeLoadBalancers
Description copied from interface:AmazonElasticLoadBalancing
Simplified method form for invoking the DescribeLoadBalancers operation.- Specified by:
describeLoadBalancers
in interfaceAmazonElasticLoadBalancing
- See Also:
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describeTags
Description copied from interface:AmazonElasticLoadBalancing
Describes the tags associated with the specified load balancers.
- Specified by:
describeTags
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DescribeTags operation returned by the service.
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detachLoadBalancerFromSubnets
public DetachLoadBalancerFromSubnetsResult detachLoadBalancerFromSubnets(DetachLoadBalancerFromSubnetsRequest request) Description copied from interface:AmazonElasticLoadBalancing
Removes the specified subnets from the set of configured subnets for the load balancer.
After a subnet is removed, all EC2 instances registered with the load balancer in the removed subnet go into the
OutOfService
state. Then, the load balancer balances the traffic among the remaining routable subnets.- Specified by:
detachLoadBalancerFromSubnets
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DetachLoadBalancerFromSubnets operation returned by the service.
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disableAvailabilityZonesForLoadBalancer
public DisableAvailabilityZonesForLoadBalancerResult disableAvailabilityZonesForLoadBalancer(DisableAvailabilityZonesForLoadBalancerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Removes the specified Availability Zones from the set of Availability Zones for the specified load balancer.
There must be at least one Availability Zone registered with a load balancer at all times. After an Availability Zone is removed, all instances registered with the load balancer that are in the removed Availability Zone go into the
OutOfService
state. Then, the load balancer attempts to equally balance the traffic among its remaining Availability Zones.For more information, see Disable an Availability Zone from a Load-Balanced Application in the Elastic Load Balancing Developer Guide.
- Specified by:
disableAvailabilityZonesForLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the DisableAvailabilityZonesForLoadBalancer operation returned by the service.
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enableAvailabilityZonesForLoadBalancer
public EnableAvailabilityZonesForLoadBalancerResult enableAvailabilityZonesForLoadBalancer(EnableAvailabilityZonesForLoadBalancerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Adds the specified Availability Zones to the set of Availability Zones for the specified load balancer.
The load balancer evenly distributes requests across all its registered Availability Zones that contain instances.
For more information, see Add Availability Zone in the Elastic Load Balancing Developer Guide.
- Specified by:
enableAvailabilityZonesForLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the EnableAvailabilityZonesForLoadBalancer operation returned by the service.
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modifyLoadBalancerAttributes
public ModifyLoadBalancerAttributesResult modifyLoadBalancerAttributes(ModifyLoadBalancerAttributesRequest request) Description copied from interface:AmazonElasticLoadBalancing
Modifies the attributes of the specified load balancer.
You can modify the load balancer attributes, such as
AccessLogs
,ConnectionDraining
, andCrossZoneLoadBalancing
by either enabling or disabling them. Or, you can modify the load balancer attributeConnectionSettings
by specifying an idle connection timeout value for your load balancer.For more information, see the following in the Elastic Load Balancing Developer Guide:
- Specified by:
modifyLoadBalancerAttributes
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the ModifyLoadBalancerAttributes operation returned by the service.
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registerInstancesWithLoadBalancer
public RegisterInstancesWithLoadBalancerResult registerInstancesWithLoadBalancer(RegisterInstancesWithLoadBalancerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Adds the specified instances to the specified load balancer.
The instance must be a running instance in the same network as the load balancer (EC2-Classic or the same VPC). If you have EC2-Classic instances and a load balancer in a VPC with ClassicLink enabled, you can link the EC2-Classic instances to that VPC and then register the linked EC2-Classic instances with the load balancer in the VPC.
Note that
RegisterInstanceWithLoadBalancer
completes when the request has been registered. Instance registration takes a little time to complete. To check the state of the registered instances, use DescribeLoadBalancers or DescribeInstanceHealth.After the instance is registered, it starts receiving traffic and requests from the load balancer. Any instance that is not in one of the Availability Zones registered for the load balancer is moved to the
OutOfService
state. If an Availability Zone is added to the load balancer later, any instances registered with the load balancer move to theInService
state.If you stop an instance registered with a load balancer and then start it, the IP addresses associated with the instance changes. Elastic Load Balancing cannot recognize the new IP address, which prevents it from routing traffic to the instances. We recommend that you use the following sequence: stop the instance, deregister the instance, start the instance, and then register the instance. To deregister instances from a load balancer, use DeregisterInstancesFromLoadBalancer.
For more information, see Deregister and Register EC2 Instances in the Elastic Load Balancing Developer Guide.
- Specified by:
registerInstancesWithLoadBalancer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the RegisterInstancesWithLoadBalancer operation returned by the service.
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removeTags
Description copied from interface:AmazonElasticLoadBalancing
Removes one or more tags from the specified load balancer.
- Specified by:
removeTags
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the RemoveTags operation returned by the service.
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setLoadBalancerListenerSSLCertificate
public SetLoadBalancerListenerSSLCertificateResult setLoadBalancerListenerSSLCertificate(SetLoadBalancerListenerSSLCertificateRequest request) Description copied from interface:AmazonElasticLoadBalancing
Sets the certificate that terminates the specified listener's SSL connections. The specified certificate replaces any prior certificate that was used on the same load balancer and port.
For more information about updating your SSL certificate, see Updating an SSL Certificate for a Load Balancer in the Elastic Load Balancing Developer Guide.
- Specified by:
setLoadBalancerListenerSSLCertificate
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the SetLoadBalancerListenerSSLCertificate operation returned by the service.
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setLoadBalancerPoliciesForBackendServer
public SetLoadBalancerPoliciesForBackendServerResult setLoadBalancerPoliciesForBackendServer(SetLoadBalancerPoliciesForBackendServerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Replaces the set of policies associated with the specified port on which the back-end server is listening with a new set of policies. At this time, only the back-end server authentication policy type can be applied to the back-end ports; this policy type is composed of multiple public key policies.
Each time you use
SetLoadBalancerPoliciesForBackendServer
to enable the policies, use thePolicyNames
parameter to list the policies that you want to enable.You can use DescribeLoadBalancers or DescribeLoadBalancerPolicies to verify that the policy is associated with the back-end server.
- Specified by:
setLoadBalancerPoliciesForBackendServer
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the SetLoadBalancerPoliciesForBackendServer operation returned by the service.
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setLoadBalancerPoliciesOfListener
public SetLoadBalancerPoliciesOfListenerResult setLoadBalancerPoliciesOfListener(SetLoadBalancerPoliciesOfListenerRequest request) Description copied from interface:AmazonElasticLoadBalancing
Associates, updates, or disables a policy with a listener for the specified load balancer. You can associate multiple policies with a listener.
- Specified by:
setLoadBalancerPoliciesOfListener
in interfaceAmazonElasticLoadBalancing
- Returns:
- Result of the SetLoadBalancerPoliciesOfListener operation returned by the service.
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shutdown
public void shutdown()Description copied from interface:AmazonElasticLoadBalancing
Shuts down this client object, releasing any resources that might be held open. This is an optional method, and callers are not expected to call it, but can if they want to explicitly release any open resources. Once a client has been shutdown, it should not be used to make any more requests.- Specified by:
shutdown
in interfaceAmazonElasticLoadBalancing
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getCachedResponseMetadata
Description copied from interface:AmazonElasticLoadBalancing
Returns additional metadata for a previously executed successful request, typically used for debugging issues where a service isn't acting as expected. This data isn't considered part of the result data returned by an operation, so it's available through this separate, diagnostic interface.Response metadata is only cached for a limited period of time, so if you need to access this extra diagnostic information for an executed request, you should use this method to retrieve it as soon as possible after executing a request.
- Specified by:
getCachedResponseMetadata
in interfaceAmazonElasticLoadBalancing
- Parameters:
request
- The originally executed request.- Returns:
- The response metadata for the specified request, or null if none is available.
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