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More work on how to configure the sqlite3 JS API bootstrapping process from higher-level code. Initial version of sqlite3-worker1-promiser, a Promise-based proxy for the Worker API #1.

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FossilOrigin-Name: b030f321bd5a38cdd5d6f6735f201afa62d30d2b0ba02e67f055b4895553a878
This commit is contained in:
stephan
2022-08-24 05:59:23 +00:00
parent efeee19a95
commit 9a34509a06
9 changed files with 537 additions and 204 deletions
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37
ext/wasm/api/sqlite3-api-worker1.js
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@ -92,11 +92,8 @@ sqlite3.initWorker1API = function(){
defaultDb: undefined,
idSeq: 0,
idMap: new WeakMap,
open: function(arg){
// TODO? if arg is a filename, look for a db in this.dbs with the
// same filename and close/reopen it (or just pass it back as is?).
if(!arg && this.defaultDb) return this.defaultDb;
const db = (Array.isArray(arg) ? new DB(...arg) : new DB(arg));
open: function(opt){
const db = new DB(opt.filename);
this.dbs[getDbId(db)] = db;
if(!this.defaultDb) this.defaultDb = db;
return db;
@ -169,14 +166,26 @@ sqlite3.initWorker1API = function(){
envelope to other calls in this API to tell them which
db to use. If it is not provided to future calls, they
will default to operating on the first-opened db.
persistent: prepend sqlite3.capi.sqlite3_web_persistent_dir()
to the given filename so that it is stored
in persistent storage _if_ the environment supports it.
If persistent storage is not supported, the filename
is used as-is.
}
*/
open: function(ev){
const oargs = [], args = (ev.args || {});
const oargs = Object.create(null), args = (ev.args || Object.create(null));
if(args.simulateError){ // undocumented internal testing option
toss("Throwing because of simulateError flag.");
}
if(args.filename) oargs.push(args.filename);
if(args.persistent && args.filename){
oargs.filaname = sqlite3.capi.sqlite3_web_persistent_dir() + args.filename;
}else if('' === args.filename){
oargs.filename = args.filename;
}else{
oargs.filename = args.filename || ':memory:';
}
const db = wState.open(oargs);
return {
filename: db.filename,
@ -184,15 +193,15 @@ sqlite3.initWorker1API = function(){
};
},
/**
Proxy for DB.close(). ev.args may either be a boolean or an
object with an `unlink` property. If that value is truthy then
the db file (if the db is currently open) will be unlinked from
the virtual filesystem, else it will be kept intact. The
result object is:
Proxy for DB.close(). ev.args may be elided or an object with
an `unlink` property. If that value is truthy then the db file
(if the db is currently open) will be unlinked from the virtual
filesystem, else it will be kept intact. The result object is:
{
filename: db filename _if_ the db is opened when this
is called, else the undefined value
dbId: the ID of the closed b, or undefined if none is closed
}
It does not error if the given db is already closed or no db is
@ -356,6 +365,7 @@ sqlite3.initWorker1API = function(){
dbId: DB handle ID,
[messageId: if set in the inbound message],
result: {
operation: "inbound message's 'type' value",
message: error string,
errorClass: class name of the error type,
input: ev.data
@ -378,6 +388,7 @@ sqlite3.initWorker1API = function(){
}catch(err){
evType = 'error';
result = {
operation: ev.type,
message: err.message,
errorClass: err.name,
input: ev
@ -405,7 +416,7 @@ sqlite3.initWorker1API = function(){
result: result
}, wMsgHandler.xfer);
};
setTimeout(()=>self.postMessage({type:'sqlite3-api',result:'worker1-ready'}), 0);
self.postMessage({type:'sqlite3-api',result:'worker1-ready'});
}.bind({self, sqlite3});
});