Class: Rdkafka::Admin

Inherits:
Object
  • Object
show all
Includes:
Helpers::OAuth
Defined in:
lib/rdkafka/admin.rb,
lib/rdkafka/admin/create_acl_handle.rb,
lib/rdkafka/admin/create_acl_report.rb,
lib/rdkafka/admin/delete_acl_handle.rb,
lib/rdkafka/admin/delete_acl_report.rb,
lib/rdkafka/admin/acl_binding_result.rb,
lib/rdkafka/admin/create_topic_handle.rb,
lib/rdkafka/admin/create_topic_report.rb,
lib/rdkafka/admin/delete_topic_handle.rb,
lib/rdkafka/admin/delete_topic_report.rb,
lib/rdkafka/admin/describe_acl_handle.rb,
lib/rdkafka/admin/describe_acl_report.rb,
lib/rdkafka/admin/delete_groups_handle.rb,
lib/rdkafka/admin/delete_groups_report.rb,
lib/rdkafka/admin/config_binding_result.rb,
lib/rdkafka/admin/describe_configs_handle.rb,
lib/rdkafka/admin/describe_configs_report.rb,
lib/rdkafka/admin/create_partitions_handle.rb,
lib/rdkafka/admin/create_partitions_report.rb,
lib/rdkafka/admin/config_resource_binding_result.rb,
lib/rdkafka/admin/incremental_alter_configs_handle.rb,
lib/rdkafka/admin/incremental_alter_configs_report.rb

Defined Under Namespace

Classes: AclBindingResult, ConfigBindingResult, ConfigResourceBindingResult, CreateAclHandle, CreateAclReport, CreatePartitionsHandle, CreatePartitionsReport, CreateTopicHandle, CreateTopicReport, DeleteAclHandle, DeleteAclReport, DeleteGroupsHandle, DeleteGroupsReport, DeleteTopicHandle, DeleteTopicReport, DescribeAclHandle, DescribeAclReport, DescribeConfigsHandle, DescribeConfigsReport, IncrementalAlterConfigsHandle, IncrementalAlterConfigsReport

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Helpers::OAuth

#oauthbearer_set_token, #oauthbearer_set_token_failure

Class Method Details

.describe_errors ⇒ Hash<Integer, Hash>

Allows us to retrieve librdkafka errors with descriptions Useful for debugging and building UIs, etc.

Returns:

  • (Hash<Integer, Hash>) —

    hash with errors mapped by code



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# File 'lib/rdkafka/admin.rb', line 12

def describe_errors
  # Memory pointers for the array of structures and count
  p_error_descs = FFI::MemoryPointer.new(:pointer)
  p_count = FFI::MemoryPointer.new(:size_t)

  # Call the attached function
  Bindings.rd_kafka_get_err_descs(p_error_descs, p_count)

  # Retrieve the number of items in the array
  count = p_count.read_uint

  # Get the pointer to the array of error descriptions
  array_of_errors = FFI::Pointer.new(Bindings::NativeErrorDesc, p_error_descs.read_pointer)

  errors = {}

  count.times do |i|
    # Get the pointer to each struct
    error_ptr = array_of_errors[i]

    # Create a new instance of NativeErrorDesc for each item
    error_desc = Bindings::NativeErrorDesc.new(error_ptr)

    # Read values from the struct
    code = error_desc[:code]

    name = ''
    desc = ''

    name = error_desc[:name].read_string unless error_desc[:name].null?
    desc = error_desc[:desc].read_string unless error_desc[:desc].null?

    errors[code] = { code: code, name: name, description: desc }
  end

  errors
end

Instance Method Details

#close ⇒ Object

Close this admin instance



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# File 'lib/rdkafka/admin.rb', line 90

def close
  return if closed?
  ObjectSpace.undefine_finalizer(self)
  @native_kafka.close
end

#closed? ⇒ Boolean

Whether this admin has closed

Returns:

  • (Boolean) 


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# File 'lib/rdkafka/admin.rb', line 97

def closed?
  @native_kafka.closed?
end

#create_acl(resource_type:, resource_name:, resource_pattern_type:, principal:, host:, operation:, permission_type:) ⇒ CreateAclHandle

Create acl

Parameters:

Returns:

  • (CreateAclHandle) —

    Create acl handle that can be used to wait for the result of creating the acl

Raises:



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# File 'lib/rdkafka/admin.rb', line 392

def create_acl(resource_type:, resource_name:, resource_pattern_type:, principal:, host:, operation:, permission_type:)
  closed_admin_check(__method__)

  # Create a rd_kafka_AclBinding_t representing the new acl
  error_buffer = FFI::MemoryPointer.from_string(" " * 256)
  new_acl_ptr = Rdkafka::Bindings.rd_kafka_AclBinding_new(
    resource_type,
    FFI::MemoryPointer.from_string(resource_name),
    resource_pattern_type,
    FFI::MemoryPointer.from_string(principal),
    FFI::MemoryPointer.from_string(host),
    operation,
    permission_type,
    error_buffer,
    256
  )
  if new_acl_ptr.null?
    raise Rdkafka::Config::ConfigError.new(error_buffer.read_string)
  end

  # Note that rd_kafka_CreateAcls can create more than one acl at a time
  pointer_array = [new_acl_ptr]
  acls_array_ptr = FFI::MemoryPointer.new(:pointer)
  acls_array_ptr.write_array_of_pointer(pointer_array)

  # Get a pointer to the queue that our request will be enqueued on
  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end

  if queue_ptr.null?
    Rdkafka::Bindings.rd_kafka_AclBinding_destroy(new_acl_ptr)
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  # Create and register the handle that we will return to the caller
  create_acl_handle = CreateAclHandle.new
  create_acl_handle[:pending] = true
  create_acl_handle[:response] = -1
  CreateAclHandle.register(create_acl_handle)

  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_CREATEACLS)
  end

  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, create_acl_handle.to_ptr)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_CreateAcls(
        inner,
        acls_array_ptr,
        1,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    CreateAclHandle.remove(create_acl_handle.to_ptr.address)
    raise
  ensure
    Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
    Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
    Rdkafka::Bindings.rd_kafka_AclBinding_destroy(new_acl_ptr)
  end

  create_acl_handle
end

#create_partitions(topic_name, partition_count) ⇒ CreateTopicHandle

Creates extra partitions for a given topic

Parameters:

  • topic_name (String)
  • partition_count (Integer) —

    how many partitions we want to end up with for given topic

Returns:

  • (CreateTopicHandle) —

    Create topic handle that can be used to wait for the result of creating the topic

Raises:

  • (ConfigError) —

    When the partition count or replication factor are out of valid range

  • (RdkafkaError) —

    When the topic name is invalid or the topic already exists

  • (RdkafkaError) —

    When the topic configuration is invalid



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# File 'lib/rdkafka/admin.rb', line 301

def create_partitions(topic_name, partition_count)
  closed_admin_check(__method__)

  @native_kafka.with_inner do |inner|
    error_buffer = FFI::MemoryPointer.from_string(" " * 256)
    new_partitions_ptr = Rdkafka::Bindings.rd_kafka_NewPartitions_new(
      FFI::MemoryPointer.from_string(topic_name),
      partition_count,
      error_buffer,
      256
    )
    if new_partitions_ptr.null?
      raise Rdkafka::Config::ConfigError.new(error_buffer.read_string)
    end

    pointer_array = [new_partitions_ptr]
    topics_array_ptr = FFI::MemoryPointer.new(:pointer)
    topics_array_ptr.write_array_of_pointer(pointer_array)

    # Get a pointer to the queue that our request will be enqueued on
    queue_ptr = Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
    if queue_ptr.null?
      Rdkafka::Bindings.rd_kafka_NewPartitions_destroy(new_partitions_ptr)
      raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
    end

    # Create and register the handle we will return to the caller
    create_partitions_handle = CreatePartitionsHandle.new
    create_partitions_handle[:pending] = true
    create_partitions_handle[:response] = -1
    CreatePartitionsHandle.register(create_partitions_handle)
    admin_options_ptr = Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_CREATEPARTITIONS)
    Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, create_partitions_handle.to_ptr)

    begin
      Rdkafka::Bindings.rd_kafka_CreatePartitions(
        inner,
        topics_array_ptr,
        1,
        admin_options_ptr,
        queue_ptr
      )
    rescue Exception
      CreatePartitionsHandle.remove(create_partitions_handle.to_ptr.address)
      raise
    ensure
      Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
      Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
      Rdkafka::Bindings.rd_kafka_NewPartitions_destroy(new_partitions_ptr)
    end

    create_partitions_handle
  end
end

#create_topic(topic_name, partition_count, replication_factor, topic_config = {}) ⇒ CreateTopicHandle

Create a topic with the given partition count and replication factor

Returns:

  • (CreateTopicHandle) —

    Create topic handle that can be used to wait for the result of creating the topic

Raises:

  • (ConfigError) —

    When the partition count or replication factor are out of valid range

  • (RdkafkaError) —

    When the topic name is invalid or the topic already exists

  • (RdkafkaError) —

    When the topic configuration is invalid



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# File 'lib/rdkafka/admin.rb', line 109

def create_topic(topic_name, partition_count, replication_factor, topic_config={})
  closed_admin_check(__method__)

  # Create a rd_kafka_NewTopic_t representing the new topic
  error_buffer = FFI::MemoryPointer.from_string(" " * 256)
  new_topic_ptr = Rdkafka::Bindings.rd_kafka_NewTopic_new(
    FFI::MemoryPointer.from_string(topic_name),
    partition_count,
    replication_factor,
    error_buffer,
    256
  )
  if new_topic_ptr.null?
    raise Rdkafka::Config::ConfigError.new(error_buffer.read_string)
  end

  unless topic_config.nil?
    topic_config.each do |key, value|
      Rdkafka::Bindings.rd_kafka_NewTopic_set_config(
        new_topic_ptr,
        key.to_s,
        value.to_s
      )
    end
  end

  # Note that rd_kafka_CreateTopics can create more than one topic at a time
  pointer_array = [new_topic_ptr]
  topics_array_ptr = FFI::MemoryPointer.new(:pointer)
  topics_array_ptr.write_array_of_pointer(pointer_array)

  # Get a pointer to the queue that our request will be enqueued on
  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end
  if queue_ptr.null?
    Rdkafka::Bindings.rd_kafka_NewTopic_destroy(new_topic_ptr)
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  # Create and register the handle we will return to the caller
  create_topic_handle = CreateTopicHandle.new
  create_topic_handle[:pending] = true
  create_topic_handle[:response] = -1
  CreateTopicHandle.register(create_topic_handle)
  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_CREATETOPICS)
  end
  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, create_topic_handle.to_ptr)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_CreateTopics(
        inner,
        topics_array_ptr,
        1,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    CreateTopicHandle.remove(create_topic_handle.to_ptr.address)
    raise
  ensure
    Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
    Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
    Rdkafka::Bindings.rd_kafka_NewTopic_destroy(new_topic_ptr)
  end

  create_topic_handle
end

#delete_acl(resource_type:, resource_name:, resource_pattern_type:, principal:, host:, operation:, permission_type:) ⇒ DeleteAclHandle

Delete acl

Parameters:

Returns:

  • (DeleteAclHandle) —

    Delete acl handle that can be used to wait for the result of deleting the acl

Raises:



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# File 'lib/rdkafka/admin.rb', line 497

def delete_acl(resource_type:, resource_name:, resource_pattern_type:, principal:, host:, operation:, permission_type:)
  closed_admin_check(__method__)

  # Create a rd_kafka_AclBinding_t representing the acl to be deleted
  error_buffer = FFI::MemoryPointer.from_string(" " * 256)

  delete_acl_ptr = Rdkafka::Bindings.rd_kafka_AclBindingFilter_new(
    resource_type,
    resource_name ? FFI::MemoryPointer.from_string(resource_name) : nil,
    resource_pattern_type,
    principal ? FFI::MemoryPointer.from_string(principal) : nil,
    host ? FFI::MemoryPointer.from_string(host) : nil,
    operation,
    permission_type,
    error_buffer,
    256
  )

  if delete_acl_ptr.null?
    raise Rdkafka::Config::ConfigError.new(error_buffer.read_string)
  end

  # Note that rd_kafka_DeleteAcls can delete more than one acl at a time
  pointer_array = [delete_acl_ptr]
  acls_array_ptr = FFI::MemoryPointer.new(:pointer)
  acls_array_ptr.write_array_of_pointer(pointer_array)

  # Get a pointer to the queue that our request will be enqueued on
  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end

  if queue_ptr.null?
    Rdkafka::Bindings.rd_kafka_AclBinding_destroy(new_acl_ptr)
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  # Create and register the handle that we will return to the caller
  delete_acl_handle = DeleteAclHandle.new
  delete_acl_handle[:pending] = true
  delete_acl_handle[:response] = -1
  DeleteAclHandle.register(delete_acl_handle)

  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_DELETEACLS)
  end

  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, delete_acl_handle.to_ptr)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_DeleteAcls(
        inner,
        acls_array_ptr,
        1,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    DeleteAclHandle.remove(delete_acl_handle.to_ptr.address)
    raise
  ensure
    Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
    Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
    Rdkafka::Bindings.rd_kafka_AclBinding_destroy(delete_acl_ptr)
  end

  delete_acl_handle
end

#delete_group(group_id) ⇒ Object 



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# File 'lib/rdkafka/admin.rb', line 181

def delete_group(group_id)
  closed_admin_check(__method__)

  # Create a rd_kafka_DeleteGroup_t representing the new topic
  delete_groups_ptr = Rdkafka::Bindings.rd_kafka_DeleteGroup_new(
    FFI::MemoryPointer.from_string(group_id)
  )

  pointer_array = [delete_groups_ptr]
  groups_array_ptr = FFI::MemoryPointer.new(:pointer)
  groups_array_ptr.write_array_of_pointer(pointer_array)

  # Get a pointer to the queue that our request will be enqueued on
  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end
  if queue_ptr.null?
    Rdkafka::Bindings.rd_kafka_DeleteTopic_destroy(delete_topic_ptr)
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  # Create and register the handle we will return to the caller
  delete_groups_handle = DeleteGroupsHandle.new
  delete_groups_handle[:pending] = true
  delete_groups_handle[:response] = -1
  DeleteGroupsHandle.register(delete_groups_handle)
  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_DELETETOPICS)
  end
  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, delete_groups_handle.to_ptr)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_DeleteGroups(
        inner,
        groups_array_ptr,
        1,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    DeleteGroupsHandle.remove(delete_groups_handle.to_ptr.address)
    raise
  ensure
    Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
    Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
    Rdkafka::Bindings.rd_kafka_DeleteGroup_destroy(delete_groups_ptr)
  end

  delete_groups_handle
end

#delete_topic(topic_name) ⇒ DeleteTopicHandle

Deletes the named topic

Returns:

  • (DeleteTopicHandle) —

    Delete topic handle that can be used to wait for the result of deleting the topic

Raises:

  • (RdkafkaError) —

    When the topic name is invalid or the topic does not exist



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# File 'lib/rdkafka/admin.rb', line 239

def delete_topic(topic_name)
  closed_admin_check(__method__)

  # Create a rd_kafka_DeleteTopic_t representing the topic to be deleted
  delete_topic_ptr = Rdkafka::Bindings.rd_kafka_DeleteTopic_new(FFI::MemoryPointer.from_string(topic_name))

  # Note that rd_kafka_DeleteTopics can create more than one topic at a time
  pointer_array = [delete_topic_ptr]
  topics_array_ptr = FFI::MemoryPointer.new(:pointer)
  topics_array_ptr.write_array_of_pointer(pointer_array)

  # Get a pointer to the queue that our request will be enqueued on
  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end
  if queue_ptr.null?
    Rdkafka::Bindings.rd_kafka_DeleteTopic_destroy(delete_topic_ptr)
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  # Create and register the handle we will return to the caller
  delete_topic_handle = DeleteTopicHandle.new
  delete_topic_handle[:pending] = true
  delete_topic_handle[:response] = -1
  DeleteTopicHandle.register(delete_topic_handle)
  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_DELETETOPICS)
  end
  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, delete_topic_handle.to_ptr)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_DeleteTopics(
        inner,
        topics_array_ptr,
        1,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    DeleteTopicHandle.remove(delete_topic_handle.to_ptr.address)
    raise
  ensure
    Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
    Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
    Rdkafka::Bindings.rd_kafka_DeleteTopic_destroy(delete_topic_ptr)
  end

  delete_topic_handle
end

#describe_acl(resource_type:, resource_name:, resource_pattern_type:, principal:, host:, operation:, permission_type:) ⇒ DescribeAclHandle

Describe acls

Parameters:

Returns:

  • (DescribeAclHandle) —

    Describe acl handle that can be used to wait for the result of fetching acls

Raises:



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# File 'lib/rdkafka/admin.rb', line 604

def describe_acl(resource_type:, resource_name:, resource_pattern_type:, principal:, host:, operation:, permission_type:)
  closed_admin_check(__method__)

  # Create a rd_kafka_AclBinding_t with the filters to fetch existing acls
  error_buffer = FFI::MemoryPointer.from_string(" " * 256)
  describe_acl_ptr = Rdkafka::Bindings.rd_kafka_AclBindingFilter_new(
    resource_type,
    resource_name ? FFI::MemoryPointer.from_string(resource_name) : nil,
    resource_pattern_type,
    principal ? FFI::MemoryPointer.from_string(principal) : nil,
    host ? FFI::MemoryPointer.from_string(host) : nil,
    operation,
    permission_type,
    error_buffer,
    256
  )
  if describe_acl_ptr.null?
    raise Rdkafka::Config::ConfigError.new(error_buffer.read_string)
  end

  # Get a pointer to the queue that our request will be enqueued on
  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end

  if queue_ptr.null?
    Rdkafka::Bindings.rd_kafka_AclBinding_destroy(new_acl_ptr)
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  # Create and register the handle that we will return to the caller
  describe_acl_handle = DescribeAclHandle.new
  describe_acl_handle[:pending] = true
  describe_acl_handle[:response] = -1
  DescribeAclHandle.register(describe_acl_handle)

  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(inner, Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_DESCRIBEACLS)
  end

  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, describe_acl_handle.to_ptr)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_DescribeAcls(
        inner,
        describe_acl_ptr,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    DescribeAclHandle.remove(describe_acl_handle.to_ptr.address)
    raise
  ensure
    Rdkafka::Bindings.rd_kafka_AdminOptions_destroy(admin_options_ptr)
    Rdkafka::Bindings.rd_kafka_queue_destroy(queue_ptr)
    Rdkafka::Bindings.rd_kafka_AclBinding_destroy(describe_acl_ptr)
  end

  describe_acl_handle
end

#describe_configs(resources) ⇒ DescribeConfigsHandle

Note:

Several resources can be requested at one go, but only one broker at a time

Describe configs

Parameters:

  • resources (Array<Hash>) —

    Array where elements are hashes with two keys: - :resource_type - numerical resource type based on Kafka API - :resource_name - string with resource name

Returns:

  • (DescribeConfigsHandle) —

    Describe config handle that can be used to wait for the result of fetching resources with their appropriate configs

Raises:



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# File 'lib/rdkafka/admin.rb', line 679

def describe_configs(resources)
  closed_admin_check(__method__)

  handle = DescribeConfigsHandle.new
  handle[:pending] = true
  handle[:response] = -1

  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end

  if queue_ptr.null?
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(
      inner,
      Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_DESCRIBECONFIGS
    )
  end

  DescribeConfigsHandle.register(handle)
  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, handle.to_ptr)

  pointer_array = resources.map do |resource_details|
    Rdkafka::Bindings.rd_kafka_ConfigResource_new(
      resource_details.fetch(:resource_type),
      FFI::MemoryPointer.from_string(
        resource_details.fetch(:resource_name)
      )
    )
  end

  configs_array_ptr = FFI::MemoryPointer.new(:pointer, pointer_array.size)
  configs_array_ptr.write_array_of_pointer(pointer_array)

  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_DescribeConfigs(
        inner,
        configs_array_ptr,
        pointer_array.size,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    DescribeConfigsHandle.remove(handle.to_ptr.address)

    raise
  ensure
    Rdkafka::Bindings.rd_kafka_ConfigResource_destroy_array(
      configs_array_ptr,
      pointer_array.size
    ) if configs_array_ptr
  end

  handle
end

#finalizer ⇒ Object 



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# File 'lib/rdkafka/admin.rb', line 72

def finalizer
  ->(_) { close }
end

#incremental_alter_configs(resources_with_configs) ⇒ IncrementalAlterConfigsHandle

Note:

Several resources can be requested at one go, but only one broker at a time

Note:

The results won’t contain altered values but only the altered resources

Alters in an incremental way all the configs provided for given resources

name, value and the proper op_type to perform on this value.

Parameters:

  • resources_with_configs (Array<Hash>) —

    resources with the configs key that contains

Returns:

  • (IncrementalAlterConfigsHandle) —

    Incremental alter configs handle that can be used to wait for the result of altering resources with their appropriate configs

Raises:



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# File 'lib/rdkafka/admin.rb', line 752

def incremental_alter_configs(resources_with_configs)
  closed_admin_check(__method__)

  handle = IncrementalAlterConfigsHandle.new
  handle[:pending] = true
  handle[:response] = -1

  queue_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_queue_get_background(inner)
  end

  if queue_ptr.null?
    raise Rdkafka::Config::ConfigError.new("rd_kafka_queue_get_background was NULL")
  end

  admin_options_ptr = @native_kafka.with_inner do |inner|
    Rdkafka::Bindings.rd_kafka_AdminOptions_new(
      inner,
      Rdkafka::Bindings::RD_KAFKA_ADMIN_OP_INCREMENTALALTERCONFIGS
    )
  end

  IncrementalAlterConfigsHandle.register(handle)
  Rdkafka::Bindings.rd_kafka_AdminOptions_set_opaque(admin_options_ptr, handle.to_ptr)

  # Tu poprawnie tworzyc
  pointer_array = resources_with_configs.map do |resource_details|
    # First build the appropriate resource representation
    resource_ptr = Rdkafka::Bindings.rd_kafka_ConfigResource_new(
      resource_details.fetch(:resource_type),
      FFI::MemoryPointer.from_string(
        resource_details.fetch(:resource_name)
      )
    )

    resource_details.fetch(:configs).each do |config|
      Bindings.rd_kafka_ConfigResource_add_incremental_config(
        resource_ptr,
        config.fetch(:name),
        config.fetch(:op_type),
        config.fetch(:value)
      )
    end

    resource_ptr
  end

  configs_array_ptr = FFI::MemoryPointer.new(:pointer, pointer_array.size)
  configs_array_ptr.write_array_of_pointer(pointer_array)


  begin
    @native_kafka.with_inner do |inner|
      Rdkafka::Bindings.rd_kafka_IncrementalAlterConfigs(
        inner,
        configs_array_ptr,
        pointer_array.size,
        admin_options_ptr,
        queue_ptr
      )
    end
  rescue Exception
    IncrementalAlterConfigsHandle.remove(handle.to_ptr.address)

    raise
  ensure
    Rdkafka::Bindings.rd_kafka_ConfigResource_destroy_array(
      configs_array_ptr,
      pointer_array.size
    ) if configs_array_ptr
  end

  handle
end

#metadata(topic_name = nil, timeout_ms = 2_000) ⇒ Metadata

Performs the metadata request using admin

Parameters:

  • topic_name (String, nil) (defaults to: nil) —

    metadat about particular topic or all if nil

  • timeout_ms (Integer) (defaults to: 2_000) —

    metadata request timeout

Returns:



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# File 'lib/rdkafka/admin.rb', line 81

def metadata(topic_name = nil, timeout_ms = 2_000)
  closed_admin_check(__method__)

  @native_kafka.with_inner do |inner|
    Metadata.new(inner, topic_name, timeout_ms)
  end
end

#name ⇒ String

Returns admin name.

Returns:

  • (String) —

    admin name



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# File 'lib/rdkafka/admin.rb', line 66

def name
  @name ||= @native_kafka.with_inner do |inner|
    ::Rdkafka::Bindings.rd_kafka_name(inner)
  end
end

#start ⇒ Object

Note:

Not needed to run unless explicit start was disabled

Starts the native Kafka polling thread and kicks off the init polling



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# File 'lib/rdkafka/admin.rb', line 61

def start
  @native_kafka.start
end