CfnDBProxyTargetGroup

class aws_cdk.aws_rds.CfnDBProxyTargetGroup(scope, id, *, db_proxy_name, target_group_name, connection_pool_configuration_info=None, db_cluster_identifiers=None, db_instance_identifiers=None)

Bases: CfnResource

The AWS::RDS::DBProxyTargetGroup resource represents a set of RDS DB instances, Aurora DB clusters, or both that a proxy can connect to.

Currently, each target group is associated with exactly one RDS DB instance or Aurora DB cluster.

This data type is used as a response element in the DescribeDBProxyTargetGroups action.

For information about RDS Proxy for Amazon RDS, see Managing Connections with Amazon RDS Proxy in the Amazon RDS User Guide .

For information about RDS Proxy for Amazon Aurora, see Managing Connections with Amazon RDS Proxy in the Amazon Aurora User Guide .

For a sample template that creates a DB proxy and registers a DB instance, see Examples in AWS::RDS::DBProxy. .. epigraph:

Limitations apply to RDS Proxy, including DB engine version limitations and AWS Region limitations.

For information about limitations that apply to RDS Proxy for Amazon RDS, see `Limitations for RDS Proxy <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-proxy.html#rds-proxy.limitations>`_ in the *Amazon RDS User Guide* .

For information about that apply to RDS Proxy for Amazon Aurora, see `Limitations for RDS Proxy <https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/rds-proxy.html#rds-proxy.limitations>`_ in the *Amazon Aurora User Guide* .

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-rds-dbproxytargetgroup.html
CloudformationResource:: AWS::RDS::DBProxyTargetGroup
ExampleMetadata:: fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
from aws_cdk import aws_rds as rds

cfn_dBProxy_target_group = rds.CfnDBProxyTargetGroup(self, "MyCfnDBProxyTargetGroup",
    db_proxy_name="dbProxyName",
    target_group_name="targetGroupName",

    # the properties below are optional
    connection_pool_configuration_info=rds.CfnDBProxyTargetGroup.ConnectionPoolConfigurationInfoFormatProperty(
        connection_borrow_timeout=123,
        init_query="initQuery",
        max_connections_percent=123,
        max_idle_connections_percent=123,
        session_pinning_filters=["sessionPinningFilters"]
    ),
    db_cluster_identifiers=["dbClusterIdentifiers"],
    db_instance_identifiers=["dbInstanceIdentifiers"]
)

Parameters:

scope (Construct) – Scope in which this resource is defined.
id (str) – Construct identifier for this resource (unique in its scope).
db_proxy_name (str) – The identifier of the DBProxy that is associated with the DBProxyTargetGroup .
target_group_name (str) – The identifier for the target group. .. epigraph:: Currently, this property must be set to default .
connection_pool_configuration_info (Union[IResolvable, ConnectionPoolConfigurationInfoFormatProperty, Dict[str, Any], None]) – Settings that control the size and behavior of the connection pool associated with a DBProxyTargetGroup .
db_cluster_identifiers (Optional[Sequence[str]]) – One or more DB cluster identifiers.
db_instance_identifiers (Optional[Sequence[str]]) – One or more DB instance identifiers.

Methods

add_deletion_override(path)

Syntactic sugar for addOverride(path, undefined).

Parameters:: path (str) – The path of the value to delete.
Return type:: None

add_dependency(target)

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

add_depends_on(target)

(deprecated) Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

Parameters:

target (CfnResource) –

Deprecated:

use addDependency

Stability:

deprecated

Return type:

None

add_metadata(key, value)

Add a value to the CloudFormation Resource Metadata.

Parameters:

key (str) –
value (Any) –

See:

Return type:

None

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

add_override(path, value)

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with “Properties.” (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example:

cfn_resource.add_override("Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes", ["myattribute"])
cfn_resource.add_override("Properties.GlobalSecondaryIndexes.1.ProjectionType", "INCLUDE")

would add the overrides Example:

"Properties": {
  "GlobalSecondaryIndexes": [
    {
      "Projection": {
        "NonKeyAttributes": [ "myattribute" ]
        ...
      }
      ...
    },
    {
      "ProjectionType": "INCLUDE"
      ...
    },
  ]
  ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.

Parameters:

path (str) –
- The path of the property, you can use dot notation to override values in complex types. Any intermediate keys will be created as needed.
value (Any) –
- The value. Could be primitive or complex.

Return type:

None

add_property_deletion_override(property_path)

Adds an override that deletes the value of a property from the resource definition.

Parameters:: property_path (str) – The path to the property.
Return type:: None

add_property_override(property_path, value)

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).

Parameters:

property_path (str) – The path of the property.
value (Any) – The value.

Return type:

None

apply_removal_policy(policy=None, *, apply_to_update_replace_policy=None, default=None)

Sets the deletion policy of the resource based on the removal policy specified.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

Parameters:

policy (Optional[RemovalPolicy]) –
apply_to_update_replace_policy (Optional[bool]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: true
default (Optional[RemovalPolicy]) – The default policy to apply in case the removal policy is not defined. Default: - Default value is resource specific. To determine the default value for a resource, please consult that specific resource’s documentation.

See:

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options

Return type:

None

get_att(attribute_name, type_hint=None)

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.

Parameters:

attribute_name (str) – The name of the attribute.
type_hint (Optional[ResolutionTypeHint]) –

Return type:

Reference

get_metadata(key)

Retrieve a value value from the CloudFormation Resource Metadata.

Parameters:

key (str) –

See:

Return type:

Any

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

inspect(inspector)

Examines the CloudFormation resource and discloses attributes.

Parameters:: inspector (TreeInspector) – tree inspector to collect and process attributes.
Return type:: None

obtain_dependencies()

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.

Return type:: List[Union[Stack, CfnResource]]

obtain_resource_dependencies()

Get a shallow copy of dependencies between this resource and other resources in the same stack.

Return type:: List[CfnResource]

override_logical_id(new_logical_id)

Overrides the auto-generated logical ID with a specific ID.

Parameters:: new_logical_id (str) – The new logical ID to use for this stack element.
Return type:: None

remove_dependency(target)

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

replace_dependency(target, new_target)

Replaces one dependency with another.

Parameters:

target (CfnResource) – The dependency to replace.
new_target (CfnResource) – The new dependency to add.

Return type:

None

to_string()

Returns a string representation of this construct.

Return type:: str
Returns:: a string representation of this resource

Attributes

CFN_RESOURCE_TYPE_NAME = 'AWS::RDS::DBProxyTargetGroup'

attr_target_group_arn

The Amazon Resource Name (ARN) representing the target group.

CloudformationAttribute:: TargetGroupArn

cfn_options: Options for this resource, such as condition, update policy etc.

cfn_resource_type: AWS resource type.

connection_pool_configuration_info: Settings that control the size and behavior of the connection pool associated with a DBProxyTargetGroup .

creation_stack

return:

the stack trace of the point where this Resource was created from, sourced from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most node +internal+ entries filtered.

db_cluster_identifiers: One or more DB cluster identifiers.

db_instance_identifiers: One or more DB instance identifiers.

db_proxy_name: The identifier of the DBProxy that is associated with the DBProxyTargetGroup .

logical_id

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).

Returns:

the logical ID as a stringified token. This value will only get resolved during synthesis.

node: The tree node.

ref

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).

stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).

target_group_name: The identifier for the target group.

Static Methods

classmethod is_cfn_element(x)

Returns true if a construct is a stack element (i.e. part of the synthesized cloudformation template).

Uses duck-typing instead of instanceof to allow stack elements from different versions of this library to be included in the same stack.

Parameters:

x (Any) –

Return type:

bool

Returns:

The construct as a stack element or undefined if it is not a stack element.

classmethod is_cfn_resource(x)

Check whether the given object is a CfnResource.

Parameters:

x (Any) –

Return type:

bool

classmethod is_construct(x)

Checks if x is a construct.

Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.

Parameters:: x (Any) – Any object.
Return type:: bool
Returns:: true if x is an object created from a class which extends Construct.

ConnectionPoolConfigurationInfoFormatProperty

class CfnDBProxyTargetGroup.ConnectionPoolConfigurationInfoFormatProperty(*, connection_borrow_timeout=None, init_query=None, max_connections_percent=None, max_idle_connections_percent=None, session_pinning_filters=None)

Bases: object

Specifies the settings that control the size and behavior of the connection pool associated with a DBProxyTargetGroup .

Parameters:

connection_borrow_timeout (Union[int, float, None]) – The number of seconds for a proxy to wait for a connection to become available in the connection pool. This setting only applies when the proxy has opened its maximum number of connections and all connections are busy with client sessions. For an unlimited wait time, specify 0 . Default: 120 Constraints: - Must be between 0 and 3600.
init_query (Optional[str]) – One or more SQL statements for the proxy to run when opening each new database connection. Typically used with SET statements to make sure that each connection has identical settings such as time zone and character set. For multiple statements, use semicolons as the separator. You can also include multiple variables in a single SET statement, such as SET x=1, y=2 . Default: no initialization query
max_connections_percent (Union[int, float, None]) – The maximum size of the connection pool for each target in a target group. The value is expressed as a percentage of the max_connections setting for the RDS DB instance or Aurora DB cluster used by the target group. If you specify MaxIdleConnectionsPercent , then you must also include a value for this parameter. Default: 10 for RDS for Microsoft SQL Server, and 100 for all other engines Constraints: - Must be between 1 and 100.
max_idle_connections_percent (Union[int, float, None]) – A value that controls how actively the proxy closes idle database connections in the connection pool. The value is expressed as a percentage of the max_connections setting for the RDS DB instance or Aurora DB cluster used by the target group. With a high value, the proxy leaves a high percentage of idle database connections open. A low value causes the proxy to close more idle connections and return them to the database. If you specify this parameter, then you must also include a value for MaxConnectionsPercent . Default: The default value is half of the value of MaxConnectionsPercent . For example, if MaxConnectionsPercent is 80, then the default value of MaxIdleConnectionsPercent is 40. If the value of MaxConnectionsPercent isn’t specified, then for SQL Server, MaxIdleConnectionsPercent is 5 , and for all other engines, the default is 50 . Constraints: - Must be between 0 and the value of MaxConnectionsPercent .
session_pinning_filters (Optional[Sequence[str]]) – Each item in the list represents a class of SQL operations that normally cause all later statements in a session using a proxy to be pinned to the same underlying database connection. Including an item in the list exempts that class of SQL operations from the pinning behavior. Default: no session pinning filters

See:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat.html

ExampleMetadata:

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
from aws_cdk import aws_rds as rds

connection_pool_configuration_info_format_property = rds.CfnDBProxyTargetGroup.ConnectionPoolConfigurationInfoFormatProperty(
    connection_borrow_timeout=123,
    init_query="initQuery",
    max_connections_percent=123,
    max_idle_connections_percent=123,
    session_pinning_filters=["sessionPinningFilters"]
)

Attributes

connection_borrow_timeout

The number of seconds for a proxy to wait for a connection to become available in the connection pool.

This setting only applies when the proxy has opened its maximum number of connections and all connections are busy with client sessions. For an unlimited wait time, specify 0 .

Default: 120

Constraints:

Must be between 0 and 3600.

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat.html#cfn-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat-connectionborrowtimeout

init_query

One or more SQL statements for the proxy to run when opening each new database connection.

Typically used with SET statements to make sure that each connection has identical settings such as time zone and character set. For multiple statements, use semicolons as the separator. You can also include multiple variables in a single SET statement, such as SET x=1, y=2 .

Default: no initialization query

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat.html#cfn-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat-initquery

max_connections_percent

The maximum size of the connection pool for each target in a target group.

The value is expressed as a percentage of the max_connections setting for the RDS DB instance or Aurora DB cluster used by the target group.

If you specify MaxIdleConnectionsPercent , then you must also include a value for this parameter.

Default: 10 for RDS for Microsoft SQL Server, and 100 for all other engines

Constraints:

Must be between 1 and 100.

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat.html#cfn-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat-maxconnectionspercent

max_idle_connections_percent

A value that controls how actively the proxy closes idle database connections in the connection pool.

The value is expressed as a percentage of the max_connections setting for the RDS DB instance or Aurora DB cluster used by the target group. With a high value, the proxy leaves a high percentage of idle database connections open. A low value causes the proxy to close more idle connections and return them to the database.

If you specify this parameter, then you must also include a value for MaxConnectionsPercent .

Default: The default value is half of the value of MaxConnectionsPercent . For example, if MaxConnectionsPercent is 80, then the default value of MaxIdleConnectionsPercent is 40. If the value of MaxConnectionsPercent isn’t specified, then for SQL Server, MaxIdleConnectionsPercent is 5 , and for all other engines, the default is 50 .

Constraints:

Must be between 0 and the value of MaxConnectionsPercent .

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat.html#cfn-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat-maxidleconnectionspercent

session_pinning_filters

Each item in the list represents a class of SQL operations that normally cause all later statements in a session using a proxy to be pinned to the same underlying database connection.

Including an item in the list exempts that class of SQL operations from the pinning behavior.

Default: no session pinning filters

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat.html#cfn-rds-dbproxytargetgroup-connectionpoolconfigurationinfoformat-sessionpinningfilters