Class: Temporalio::Client::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/temporalio/client/connection.rb,
lib/temporalio/client/connection/service.rb,
lib/temporalio/client/connection/test_service.rb,
lib/temporalio/client/connection/cloud_service.rb,
lib/temporalio/client/connection/operator_service.rb,
lib/temporalio/client/connection/workflow_service.rb

Overview

Connection to Temporal server that is not namespace specific. Most users will use connect instead of this directly.

Defined Under Namespace

Classes: CloudService, DnsLoadBalancingOptions, HTTPConnectProxyOptions, KeepAliveOptions, OperatorService, Options, RPCRetryOptions, Service, TLSOptions, TestService, WorkflowService

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(target_host:, api_key: nil, tls: nil, rpc_metadata: {}, rpc_retry: RPCRetryOptions.new, identity: "#{Process.pid}@#{Socket.gethostname}", keep_alive: KeepAliveOptions.new, http_connect_proxy: nil, runtime: Runtime.default, lazy_connect: false, dns_load_balancing: nil, around_connect: nil) ⇒ Connection

Connect to Temporal server. Most users will use Temporalio::Client.connect instead of this directly. Parameters here match Options returned from #options by intention so options can be dup’d, altered, splatted to create a new connection.

Parameters:

  • target_host (String) —

    host:port for the Temporal server. For local development, this is often localhost:7233.

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

    API key for Temporal. This becomes the Authorization HTTP header with “Bearer ” prepended. This is only set if RPC metadata doesn’t already have an authorization key.

  • tls (Boolean, TLSOptions, nil) (defaults to: nil) —

    If false, do not use TLS. If true, use system default TLS options. If TLS options are present, those TLS options will be used. If nil (the default), TLS will be auto-enabled if api_key is provided.

  • rpc_metadata (Hash<String, String>) (defaults to: {}) —

    Headers to use for all calls to the server. Keys here can be overriden by per-call RPC metadata keys.

  • rpc_retry (RPCRetryOptions) (defaults to: RPCRetryOptions.new) —

    Retry options for direct service calls (when opted in) or all high-level calls made by this client (which all opt-in to retries by default).

  • identity (String) (defaults to: "#{Process.pid}@#{Socket.gethostname}") —

    Identity for this client.

  • keep_alive (KeepAliveOptions) (defaults to: KeepAliveOptions.new) —

    Keep-alive options for the client connection. Can be set to nil to disable.

  • http_connect_proxy (HTTPConnectProxyOptions, nil) (defaults to: nil) —

    Options for HTTP CONNECT proxy.

  • runtime (Runtime) (defaults to: Runtime.default) —

    Runtime for this client.

  • lazy_connect (Boolean) (defaults to: false) —

    If true, there is no connection until the first call is attempted or a worker is created with it. Clients from lazy connections cannot be used for workers if they have not performed a connection.

  • dns_load_balancing (DnsLoadBalancingOptions, nil) (defaults to: nil) —

    DNS load balancing options for this connection. Default is nil (disabled). Silently disabled when http_connect_proxy is set, since the two are mutually exclusive.

  • around_connect (Proc, nil) (defaults to: nil) —

    If present, this proc accepts two values: options and a block. The block must be yielded to only once with the options. The block does not return a meaningful value, nor should around_connect.

See Also:



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# File 'lib/temporalio/client/connection.rb', line 196

def initialize(
  target_host:,
  api_key: nil,
  tls: nil,
  rpc_metadata: {},
  rpc_retry: RPCRetryOptions.new,
  identity: "#{Process.pid}@#{Socket.gethostname}",
  keep_alive: KeepAliveOptions.new,
  http_connect_proxy: nil,
  runtime: Runtime.default,
  lazy_connect: false,
  dns_load_balancing: nil,
  around_connect: nil
)
  @options = Options.new(
    target_host:,
    api_key:,
    tls:,
    rpc_metadata:,
    rpc_retry:,
    identity:,
    keep_alive:,
    http_connect_proxy:,
    runtime:,
    lazy_connect:,
    dns_load_balancing:
  ).freeze
  @core_client_mutex = Mutex.new
  # Create core client now if not lazy, applying around_connect if present
  if around_connect
    # Technically around_connect can never run the block for whatever reason (i.e. plugin returning a mock
    # connection), so we don't enforce it
    around_connect.call(@options) do |options|
      @options = options
      _core_client unless lazy_connect
      nil
    end
  else
    _core_client unless lazy_connect
  end
  # Create service instances
  @workflow_service = WorkflowService.new(self)
  @operator_service = OperatorService.new(self)
  @cloud_service = CloudService.new(self)
end

Instance Attribute Details

#cloud_service ⇒ CloudService (readonly)

Returns Raw gRPC cloud service.

Returns:



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# File 'lib/temporalio/client/connection.rb', line 164

def cloud_service
  @cloud_service
end

#operator_service ⇒ OperatorService (readonly)

Returns Raw gRPC operator service.

Returns:



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# File 'lib/temporalio/client/connection.rb', line 161

def operator_service
  @operator_service
end

#options ⇒ Options (readonly)

Returns Frozen options for this client which has the same attributes as #initialize. Note that if #api_key= or #rpc_metadata= are updated, the options object is replaced with those changes (it is not mutated in place).

Returns:

  • (Options) —

    Frozen options for this client which has the same attributes as #initialize. Note that if #api_key= or #rpc_metadata= are updated, the options object is replaced with those changes (it is not mutated in place).



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# File 'lib/temporalio/client/connection.rb', line 155

def options
  @options
end

#workflow_service ⇒ WorkflowService (readonly)

Returns Raw gRPC workflow service.

Returns:



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# File 'lib/temporalio/client/connection.rb', line 158

def workflow_service
  @workflow_service
end

Instance Method Details

#api_key ⇒ String?

Returns API key. This is a shortcut for ‘options.api_key`.

Returns:

  • (String, nil) —

    API key. This is a shortcut for ‘options.api_key`.



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# File 'lib/temporalio/client/connection.rb', line 259

def api_key
  @options.api_key
end

#api_key=(new_key) ⇒ Object

Set the API key for all future calls. This also makes a new object for #options with the changes.

Parameters:

  • new_key (String, nil) —

    New API key.



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# File 'lib/temporalio/client/connection.rb', line 266

def api_key=(new_key)
  # Mutate the client if connected then mutate options
  @core_client_mutex.synchronize do
    @core_client&.update_api_key(new_key)
    @options = @options.with(api_key: new_key)
  end
end

#connected? ⇒ Boolean

Returns Whether this connection is connected. This is always ‘true` unless `lazy_connect` option was originally set, in which case this will be `false` until the first call is made.

Returns:

  • (Boolean) —

    Whether this connection is connected. This is always ‘true` unless `lazy_connect` option was originally set, in which case this will be `false` until the first call is made.



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# File 'lib/temporalio/client/connection.rb', line 254

def connected?
  !@core_client.nil?
end

#identity ⇒ String

Returns Client identity.

Returns:

  • (String) —

    Client identity.



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# File 'lib/temporalio/client/connection.rb', line 248

def identity
  @options.identity
end

#rpc_metadata ⇒ Hash<String, String>

Returns RPC metadata (aka HTTP headers). This is a shortcut for ‘options.rpc_metadata`.

Returns:

  • (Hash<String, String>) —

    RPC metadata (aka HTTP headers). This is a shortcut for ‘options.rpc_metadata`.



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# File 'lib/temporalio/client/connection.rb', line 275

def rpc_metadata
  @options.rpc_metadata
end

#rpc_metadata=(rpc_metadata) ⇒ Object

Set the RPC metadata (aka HTTP headers) for all future calls. This also makes a new object for #options with the changes.

Parameters:

  • rpc_metadata (Hash<String, String>) —

    New API key.



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# File 'lib/temporalio/client/connection.rb', line 283

def rpc_metadata=(rpc_metadata)
  # Mutate the client if connected then mutate options
  @core_client_mutex.synchronize do
    @core_client&.update_metadata(rpc_metadata)
    @options = @options.with(rpc_metadata: rpc_metadata)
  end
end

#target_host ⇒ String

Returns Target host this connection is connected to.

Returns:

  • (String) —

    Target host this connection is connected to.



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# File 'lib/temporalio/client/connection.rb', line 243

def target_host
  @options.target_host
end