Class RoutingRule.Builder (2.39.1) 

public static final class RoutingRule.Builder extends GeneratedMessageV3.Builder<RoutingRule.Builder> implements RoutingRuleOrBuilder

Specifies the routing information that should be sent along with the request in the form of routing header. NOTE: All service configuration rules follow the "last one wins" order.

The examples below will apply to an RPC which has the following request type:

Message Definition:

 message Request {
   // The name of the Table
   // Values can be of the following formats:
   // - <code>projects/&lt;project&gt;/tables/&lt;table&gt;</code>
   // - <code>projects/&lt;project&gt;/instances/&lt;instance&gt;/tables/&lt;table&gt;</code>
   // - <code>region/&lt;region&gt;/zones/&lt;zone&gt;/tables/&lt;table&gt;</code>
   string table_name = 1;

   // This value specifies routing for replication.
   // It can be in the following formats:
   // - <code>profiles/&lt;profile_id&gt;</code>
   // - a legacy <code>profile_id</code> that can be any string
   string app_profile_id = 2;
 }

Example message:

 {
   table_name: projects/proj_foo/instances/instance_bar/table/table_baz,
   app_profile_id: profiles/prof_qux
 }

The routing header consists of one or multiple key-value pairs. Every key and value must be percent-encoded, and joined together in the format of key1=value1&key2=value2. In the examples below I am skipping the percent-encoding for readablity.

Example 1

Extracting a field from the request to put into the routing header unchanged, with the key equal to the field name.

annotation:

 option (google.api.routing) = {
   // Take the <code>app_profile_id</code>.
   routing_parameters {
     field: "app_profile_id"
   }
 };

result:

 x-goog-request-params: app_profile_id=profiles/prof_qux

Example 2

Extracting a field from the request to put into the routing header unchanged, with the key different from the field name.

annotation:

 option (google.api.routing) = {
   // Take the <code>app_profile_id</code>, but name it <code>routing_id</code> in the header.
   routing_parameters {
     field: "app_profile_id"
     path_template: "{routing_id=**}"
   }
 };

result:

 x-goog-request-params: routing_id=profiles/prof_qux

Example 3

Extracting a field from the request to put into the routing header, while matching a path template syntax on the field's value.

NB: it is more useful to send nothing than to send garbage for the purpose of dynamic routing, since garbage pollutes cache. Thus the matching.

Sub-example 3a

The field matches the template.

annotation:

 option (google.api.routing) = {
   // Take the <code>table_name</code>, if it's well-formed (with project-based
   // syntax).
   routing_parameters {
     field: "table_name"
     path_template: "{table_name=projects/&#42;&#47;instances/&#42;&#47;&#42;*}"
   }
 };

result:

 x-goog-request-params:
 table_name=projects/proj_foo/instances/instance_bar/table/table_baz

Sub-example 3b

The field does not match the template.

annotation:

 option (google.api.routing) = {
   // Take the <code>table_name</code>, if it's well-formed (with region-based
   // syntax).
   routing_parameters {
     field: "table_name"
     path_template: "{table_name=regions/&#42;&#47;zones/&#42;&#47;&#42;*}"
   }
 };

result:

 &lt;no routing header will be sent&gt;

Sub-example 3c

Multiple alternative conflictingly named path templates are specified. The one that matches is used to construct the header.

annotation:

 option (google.api.routing) = {
   // Take the <code>table_name</code>, if it's well-formed, whether
   // using the region- or projects-based syntax.

   routing_parameters {
     field: "table_name"
     path_template: "{table_name=regions/&#42;&#47;zones/&#42;&#47;&#42;*}"
   }
   routing_parameters {
     field: "table_name"
     path_template: "{table_name=projects/&#42;&#47;instances/&#42;&#47;&#42;*}"
   }
 };

result:

 x-goog-request-params:
 table_name=projects/proj_foo/instances/instance_bar/table/table_baz

Example 4

Extracting a single routing header key-value pair by matching a template syntax on (a part of) a single request field.

annotation:

 option (google.api.routing) = {
   // Take just the project id from the <code>table_name</code> field.
   routing_parameters {
     field: "table_name"
     path_template: "{routing_id=projects/&#42;}/&#42;*"
   }
 };

result:

 x-goog-request-params: routing_id=projects/proj_foo

Example 5

Extracting a single routing header key-value pair by matching several conflictingly named path templates on (parts of) a single request field. The last template to match "wins" the conflict.

annotation:

 option (google.api.routing) = {
   // If the <code>table_name</code> does not have instances information,
   // take just the project id for routing.
   // Otherwise take project + instance.

   routing_parameters {
     field: "table_name"
     path_template: "{routing_id=projects/&#42;}/&#42;*"
   }
   routing_parameters {
     field: "table_name"
     path_template: "{routing_id=projects/&#42;&#47;instances/&#42;}/&#42;*"
   }
 };

result:

 x-goog-request-params:
 routing_id=projects/proj_foo/instances/instance_bar

Example 6

Extracting multiple routing header key-value pairs by matching several non-conflicting path templates on (parts of) a single request field.

Sub-example 6a

Make the templates strict, so that if the table_name does not have an instance information, nothing is sent.

annotation:

 option (google.api.routing) = {
   // The routing code needs two keys instead of one composite
   // but works only for the tables with the "project-instance" name
   // syntax.

   routing_parameters {
     field: "table_name"
     path_template: "{project_id=projects/&#42;}/instances/&#42;&#47;&#42;*"
   }
   routing_parameters {
     field: "table_name"
     path_template: "projects/&#42;&#47;{instance_id=instances/&#42;}/&#42;*"
   }
 };

result:

 x-goog-request-params:
 project_id=projects/proj_foo&amp;instance_id=instances/instance_bar

Sub-example 6b

Make the templates loose, so that if the table_name does not have an instance information, just the project id part is sent.

annotation:

 option (google.api.routing) = {
   // The routing code wants two keys instead of one composite
   // but will work with just the <code>project_id</code> for tables without
   // an instance in the <code>table_name</code>.

   routing_parameters {
     field: "table_name"
     path_template: "{project_id=projects/&#42;}/&#42;*"
   }
   routing_parameters {
     field: "table_name"
     path_template: "projects/&#42;&#47;{instance_id=instances/&#42;}/&#42;*"
   }
 };

result (is the same as 6a for our example message because it has the instance information):

 x-goog-request-params:
 project_id=projects/proj_foo&amp;instance_id=instances/instance_bar

Example 7

Extracting multiple routing header key-value pairs by matching several path templates on multiple request fields.

NB: note that here there is no way to specify sending nothing if one of the fields does not match its template. E.g. if the table_name is in the wrong format, the project_id will not be sent, but the routing_id will be. The backend routing code has to be aware of that and be prepared to not receive a full complement of keys if it expects multiple.

annotation:

 option (google.api.routing) = {
   // The routing needs both <code>project_id</code> and <code>routing_id</code>
   // (from the <code>app_profile_id</code> field) for routing.

   routing_parameters {
     field: "table_name"
     path_template: "{project_id=projects/&#42;}/&#42;*"
   }
   routing_parameters {
     field: "app_profile_id"
     path_template: "{routing_id=**}"
   }
 };

result:

 x-goog-request-params:
 project_id=projects/proj_foo&amp;routing_id=profiles/prof_qux

Example 8

Extracting a single routing header key-value pair by matching several conflictingly named path templates on several request fields. The last template to match "wins" the conflict.

annotation:

 option (google.api.routing) = {
   // The <code>routing_id</code> can be a project id or a region id depending on
   // the table name format, but only if the <code>app_profile_id</code> is not set.
   // If <code>app_profile_id</code> is set it should be used instead.

   routing_parameters {
     field: "table_name"
     path_template: "{routing_id=projects/&#42;}/&#42;*"
   }
   routing_parameters {
      field: "table_name"
      path_template: "{routing_id=regions/&#42;}/&#42;*"
   }
   routing_parameters {
     field: "app_profile_id"
     path_template: "{routing_id=**}"
   }
 };

result:

 x-goog-request-params: routing_id=profiles/prof_qux

Example 9

Bringing it all together.

annotation:

 option (google.api.routing) = {
   // For routing both <code>table_location</code> and a <code>routing_id</code> are needed.
   //
   // table_location can be either an instance id or a region+zone id.
   //
   // For <code>routing_id</code>, take the value of <code>app_profile_id</code>
   // - If it's in the format <code>profiles/&lt;profile_id&gt;</code>, send
   // just the <code>&lt;profile_id&gt;</code> part.
   // - If it's any other literal, send it as is.
   // If the <code>app_profile_id</code> is empty, and the <code>table_name</code> starts with
   // the project_id, send that instead.

   routing_parameters {
     field: "table_name"
     path_template: "projects/&#42;&#47;{table_location=instances/&#42;}/tables/&#42;"
   }
   routing_parameters {
     field: "table_name"
     path_template: "{table_location=regions/&#42;&#47;zones/&#42;}/tables/&#42;"
   }
   routing_parameters {
     field: "table_name"
     path_template: "{routing_id=projects/&#42;}/&#42;*"
   }
   routing_parameters {
     field: "app_profile_id"
     path_template: "{routing_id=**}"
   }
   routing_parameters {
     field: "app_profile_id"
     path_template: "profiles/{routing_id=*}"
   }
 };

result:

 x-goog-request-params:
 table_location=instances/instance_bar&amp;routing_id=prof_qux

Protobuf type google.api.RoutingRule

Inheritance

Object > AbstractMessageLite.Builder<MessageType,BuilderType> > AbstractMessage.Builder<BuilderType> > GeneratedMessageV3.Builder > RoutingRule.Builder

Static Methods

getDescriptor()

public static final Descriptors.Descriptor getDescriptor()
Returns
Type Description
Descriptor

Methods

addAllRoutingParameters(Iterable<? extends RoutingParameter> values)

public RoutingRule.Builder addAllRoutingParameters(Iterable<? extends RoutingParameter> values)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
values Iterable<? extends com.google.api.RoutingParameter>
Returns
Type Description
RoutingRule.Builder

addRepeatedField(Descriptors.FieldDescriptor field, Object value)

public RoutingRule.Builder addRepeatedField(Descriptors.FieldDescriptor field, Object value)
Parameters
Name Description
field FieldDescriptor
value Object
Returns
Type Description
RoutingRule.Builder
Overrides

addRoutingParameters(RoutingParameter value)

public RoutingRule.Builder addRoutingParameters(RoutingParameter value)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
value RoutingParameter
Returns
Type Description
RoutingRule.Builder

addRoutingParameters(RoutingParameter.Builder builderForValue)

public RoutingRule.Builder addRoutingParameters(RoutingParameter.Builder builderForValue)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
builderForValue RoutingParameter.Builder
Returns
Type Description
RoutingRule.Builder

addRoutingParameters(int index, RoutingParameter value)

public RoutingRule.Builder addRoutingParameters(int index, RoutingParameter value)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameters
Name Description
index int
value RoutingParameter
Returns
Type Description
RoutingRule.Builder

addRoutingParameters(int index, RoutingParameter.Builder builderForValue)

public RoutingRule.Builder addRoutingParameters(int index, RoutingParameter.Builder builderForValue)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameters
Name Description
index int
builderForValue RoutingParameter.Builder
Returns
Type Description
RoutingRule.Builder

addRoutingParametersBuilder()

public RoutingParameter.Builder addRoutingParametersBuilder()

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Returns
Type Description
RoutingParameter.Builder

addRoutingParametersBuilder(int index)

public RoutingParameter.Builder addRoutingParametersBuilder(int index)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
index int
Returns
Type Description
RoutingParameter.Builder

build()

public RoutingRule build()
Returns
Type Description
RoutingRule

buildPartial()

public RoutingRule buildPartial()
Returns
Type Description
RoutingRule

clear()

public RoutingRule.Builder clear()
Returns
Type Description
RoutingRule.Builder
Overrides

clearField(Descriptors.FieldDescriptor field)

public RoutingRule.Builder clearField(Descriptors.FieldDescriptor field)
Parameter
Name Description
field FieldDescriptor
Returns
Type Description
RoutingRule.Builder
Overrides

clearOneof(Descriptors.OneofDescriptor oneof)

public RoutingRule.Builder clearOneof(Descriptors.OneofDescriptor oneof)
Parameter
Name Description
oneof OneofDescriptor
Returns
Type Description
RoutingRule.Builder
Overrides

clearRoutingParameters()

public RoutingRule.Builder clearRoutingParameters()

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Returns
Type Description
RoutingRule.Builder

clone()

public RoutingRule.Builder clone()
Returns
Type Description
RoutingRule.Builder
Overrides

getDefaultInstanceForType()

public RoutingRule getDefaultInstanceForType()
Returns
Type Description
RoutingRule

getDescriptorForType()

public Descriptors.Descriptor getDescriptorForType()
Returns
Type Description
Descriptor
Overrides

getRoutingParameters(int index)

public RoutingParameter getRoutingParameters(int index)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
index int
Returns
Type Description
RoutingParameter

getRoutingParametersBuilder(int index)

public RoutingParameter.Builder getRoutingParametersBuilder(int index)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
index int
Returns
Type Description
RoutingParameter.Builder

getRoutingParametersBuilderList()

public List<RoutingParameter.Builder> getRoutingParametersBuilderList()

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Returns
Type Description
List<Builder>

getRoutingParametersCount()

public int getRoutingParametersCount()

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Returns
Type Description
int

getRoutingParametersList()

public List<RoutingParameter> getRoutingParametersList()

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Returns
Type Description
List<RoutingParameter>

getRoutingParametersOrBuilder(int index)

public RoutingParameterOrBuilder getRoutingParametersOrBuilder(int index)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
index int
Returns
Type Description
RoutingParameterOrBuilder

getRoutingParametersOrBuilderList()

public List<? extends RoutingParameterOrBuilder> getRoutingParametersOrBuilderList()

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Returns
Type Description
List<? extends com.google.api.RoutingParameterOrBuilder>

internalGetFieldAccessorTable()

protected GeneratedMessageV3.FieldAccessorTable internalGetFieldAccessorTable()
Returns
Type Description
FieldAccessorTable
Overrides

isInitialized()

public final boolean isInitialized()
Returns
Type Description
boolean
Overrides

mergeFrom(RoutingRule other)

public RoutingRule.Builder mergeFrom(RoutingRule other)
Parameter
Name Description
other RoutingRule
Returns
Type Description
RoutingRule.Builder

mergeFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry)

public RoutingRule.Builder mergeFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry)
Parameters
Name Description
input CodedInputStream
extensionRegistry ExtensionRegistryLite
Returns
Type Description
RoutingRule.Builder
Overrides
Exceptions
Type Description
IOException

mergeFrom(Message other)

public RoutingRule.Builder mergeFrom(Message other)
Parameter
Name Description
other Message
Returns
Type Description
RoutingRule.Builder
Overrides

mergeUnknownFields(UnknownFieldSet unknownFields)

public final RoutingRule.Builder mergeUnknownFields(UnknownFieldSet unknownFields)
Parameter
Name Description
unknownFields UnknownFieldSet
Returns
Type Description
RoutingRule.Builder
Overrides

removeRoutingParameters(int index)

public RoutingRule.Builder removeRoutingParameters(int index)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameter
Name Description
index int
Returns
Type Description
RoutingRule.Builder

setField(Descriptors.FieldDescriptor field, Object value)

public RoutingRule.Builder setField(Descriptors.FieldDescriptor field, Object value)
Parameters
Name Description
field FieldDescriptor
value Object
Returns
Type Description
RoutingRule.Builder
Overrides

setRepeatedField(Descriptors.FieldDescriptor field, int index, Object value)

public RoutingRule.Builder setRepeatedField(Descriptors.FieldDescriptor field, int index, Object value)
Parameters
Name Description
field FieldDescriptor
index int
value Object
Returns
Type Description
RoutingRule.Builder
Overrides

setRoutingParameters(int index, RoutingParameter value)

public RoutingRule.Builder setRoutingParameters(int index, RoutingParameter value)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameters
Name Description
index int
value RoutingParameter
Returns
Type Description
RoutingRule.Builder

setRoutingParameters(int index, RoutingParameter.Builder builderForValue)

public RoutingRule.Builder setRoutingParameters(int index, RoutingParameter.Builder builderForValue)

A collection of Routing Parameter specifications. NOTE: If multiple Routing Parameters describe the same key (via the path_template field or via the field field when path_template is not provided), "last one wins" rule determines which Parameter gets used. See the examples for more details.

repeated .google.api.RoutingParameter routing_parameters = 2;

Parameters
Name Description
index int
builderForValue RoutingParameter.Builder
Returns
Type Description
RoutingRule.Builder

setUnknownFields(UnknownFieldSet unknownFields)

public final RoutingRule.Builder setUnknownFields(UnknownFieldSet unknownFields)
Parameter
Name Description
unknownFields UnknownFieldSet
Returns
Type Description
RoutingRule.Builder
Overrides