knitty.core — com.github.anjensan/knitty 0.6.0-alpha4

*executor* clj

*registry* clj

*tracing* clj

bind-yarn clj

(bind-yarn yarn yarn-target)

Redeclares yarn as a symlink to the yarn-target.

declare-yarn clj macro

(declare-yarn nm)

Defines abstract yarn without an implementation, useful for making forward declarations.

defyarn clj macro

(defyarn name docstring?)

(defyarn name docstring? [dependencies*] & body)

Defines yarn - computation node. Uses current ns to build qualified keyword as yarn id. Examples:

;; declare ::yarn-1 without a body
(defyarn yarn-1)

;; declare ::yarn-2 with docstring
(defyarn yarn-2 "documentation")

;; define ::yarn-3 without any inputs
(defyarn yarn-3 {} (rand-int 10))

;; define ::yarn-4 with inputs
(defyarn yarn-4 {x yarn-3} (str "Random is" x))

defyarn-method clj macro

(defyarn-method multiyarn-name dispatch-value bindings-vec & body)

Creates and installs a new method of multiyarn associated with dispatch-value.

defyarn-multi clj macro

(defyarn-multi name docstring? dispatch-yarn & multi-options)

Defines a new multiyarn. Dispatching is routed by the value of dispatch-yarn' using same mechanics asdefmultimacro. Optional parameters are:hierarchyand:default`.

enable-tracing! clj

(enable-tracing!)

(enable-tracing! enable)

Globally enable knitty tracing.

register-yarn clj

(register-yarn yarn)

(register-yarn yarn no-override)

Registers Yarn into the global registry, do nothing when yarn is already registed and no-override flag is true.

set-executor! clj

(set-executor! executor)

(set-executor! executor shutdown-current)

Globally set knitty executor.

yank clj macro

(yank inputs yarns)

(yank inputs yarns & {:as opts})

Computes and adds missing nodes into 'inputs' map. Always returns deferred.

yank* clj

(yank* inputs yarns)

(yank* inputs yarns opts)

Computes missing nodes. Always returns deferred resolved into YankResult. YankResult implements ILookup, Seqable, IObj, IKVReduce and IReduceInit.

Optinans are:

• :executor a instance of java.util.concurrent.Executor which is used to run code;
• :preload preload all values from input map;
• :bindings flag, indicating that thread-local bindings should be captured and installed for yarns;
• :tracing flag, do we need to capture tracing (introduce some perfomance penalties);
• :registry a knitty registry with avalable yarns, usefull for mocking code.

yank-error? clj

(yank-error? ex)

Returns true when exception is rethrown by yank.

yank1 clj macro

(yank1 inputs yarns)

(yank1 inputs yarn & {:as opts})

Computes and returns a single node. Intended to be used in REPL sessions where there is needed to pick just a single yarn value. Tracing is disabled, use wrapped yank* if you need it.

Logically similar to:

(md/chain (yank inputs [::yarn-key]) ::yarn-key)

yarn clj macro

(yarn k & exprs)

Returns yarn object (without registering into the global registry). May capture variables from outer scope.

yarn-prefer-method clj macro

(yarn-prefer-method yarn-ref dispatch-val-x dispatch-val-y)

Causes the multiyarn to prefer matches of dispatch-val-x over dispatch-val-y

yr->map clj

(yr->map yr)

Transforms result of yank* into persistent map.