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Farm.js
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Created
Thu, Aug 22, 10:46
Size
3 KB
Mime Type
text/x-c++
Expires
Sat, Aug 24, 10:46 (2 d)
Engine
blob
Format
Raw Data
Handle
20084378
Attached To
rOACCT Open Access Compliance Check Tool (OACCT)
Farm.js
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'use strict'
;
Object
.
defineProperty
(
exports
,
'__esModule'
,
{
value
:
true
});
exports
.
default
=
void
0
;
var
_types
=
require
(
'./types'
);
function
_defineProperty
(
obj
,
key
,
value
)
{
if
(
key
in
obj
)
{
Object
.
defineProperty
(
obj
,
key
,
{
value
:
value
,
enumerable
:
true
,
configurable
:
true
,
writable
:
true
});
}
else
{
obj
[
key
]
=
value
;
}
return
obj
;
}
class
Farm
{
constructor
(
numOfWorkers
,
callback
,
computeWorkerKey
)
{
_defineProperty
(
this
,
'_computeWorkerKey'
,
void
0
);
_defineProperty
(
this
,
'_cacheKeys'
,
void
0
);
_defineProperty
(
this
,
'_callback'
,
void
0
);
_defineProperty
(
this
,
'_last'
,
void
0
);
_defineProperty
(
this
,
'_locks'
,
void
0
);
_defineProperty
(
this
,
'_numOfWorkers'
,
void
0
);
_defineProperty
(
this
,
'_offset'
,
void
0
);
_defineProperty
(
this
,
'_queue'
,
void
0
);
this
.
_cacheKeys
=
Object
.
create
(
null
);
this
.
_callback
=
callback
;
this
.
_last
=
[];
this
.
_locks
=
[];
this
.
_numOfWorkers
=
numOfWorkers
;
this
.
_offset
=
0
;
this
.
_queue
=
[];
if
(
computeWorkerKey
)
{
this
.
_computeWorkerKey
=
computeWorkerKey
;
}
}
doWork
(
method
,
...
args
)
{
const
customMessageListeners
=
new
Set
();
const
addCustomMessageListener
=
listener
=>
{
customMessageListeners
.
add
(
listener
);
return
()
=>
{
customMessageListeners
.
delete
(
listener
);
};
};
const
onCustomMessage
=
message
=>
{
customMessageListeners
.
forEach
(
listener
=>
listener
(
message
));
};
const
promise
=
new
Promise
((
resolve
,
reject
)
=>
{
const
computeWorkerKey
=
this
.
_computeWorkerKey
;
const
request
=
[
_types
.
CHILD_MESSAGE_CALL
,
false
,
method
,
args
];
let
worker
=
null
;
let
hash
=
null
;
if
(
computeWorkerKey
)
{
hash
=
computeWorkerKey
.
call
(
this
,
method
,
...
args
);
worker
=
hash
==
null
?
null
:
this
.
_cacheKeys
[
hash
];
}
const
onStart
=
worker
=>
{
if
(
hash
!=
null
)
{
this
.
_cacheKeys
[
hash
]
=
worker
;
}
};
const
onEnd
=
(
error
,
result
)
=>
{
customMessageListeners
.
clear
();
if
(
error
)
{
reject
(
error
);
}
else
{
resolve
(
result
);
}
};
const
task
=
{
onCustomMessage
,
onEnd
,
onStart
,
request
};
if
(
worker
)
{
this
.
_enqueue
(
task
,
worker
.
getWorkerId
());
}
else
{
this
.
_push
(
task
);
}
});
promise
.
UNSTABLE_onCustomMessage
=
addCustomMessageListener
;
return
promise
;
}
_getNextTask
(
workerId
)
{
let
queueHead
=
this
.
_queue
[
workerId
];
while
(
queueHead
&&
queueHead
.
task
.
request
[
1
])
{
queueHead
=
queueHead
.
next
||
null
;
}
this
.
_queue
[
workerId
]
=
queueHead
;
return
queueHead
&&
queueHead
.
task
;
}
_process
(
workerId
)
{
if
(
this
.
_isLocked
(
workerId
))
{
return
this
;
}
const
task
=
this
.
_getNextTask
(
workerId
);
if
(
!
task
)
{
return
this
;
}
const
onEnd
=
(
error
,
result
)
=>
{
task
.
onEnd
(
error
,
result
);
this
.
_unlock
(
workerId
);
this
.
_process
(
workerId
);
};
task
.
request
[
1
]
=
true
;
this
.
_lock
(
workerId
);
this
.
_callback
(
workerId
,
task
.
request
,
task
.
onStart
,
onEnd
,
task
.
onCustomMessage
);
return
this
;
}
_enqueue
(
task
,
workerId
)
{
const
item
=
{
next
:
null
,
task
};
if
(
task
.
request
[
1
])
{
return
this
;
}
if
(
this
.
_queue
[
workerId
])
{
this
.
_last
[
workerId
].
next
=
item
;
}
else
{
this
.
_queue
[
workerId
]
=
item
;
}
this
.
_last
[
workerId
]
=
item
;
this
.
_process
(
workerId
);
return
this
;
}
_push
(
task
)
{
for
(
let
i
=
0
;
i
<
this
.
_numOfWorkers
;
i
++
)
{
this
.
_enqueue
(
task
,
(
this
.
_offset
+
i
)
%
this
.
_numOfWorkers
);
}
this
.
_offset
++
;
return
this
;
}
_lock
(
workerId
)
{
this
.
_locks
[
workerId
]
=
true
;
}
_unlock
(
workerId
)
{
this
.
_locks
[
workerId
]
=
false
;
}
_isLocked
(
workerId
)
{
return
this
.
_locks
[
workerId
];
}
}
exports
.
default
=
Farm
;
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