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Write to indexeddb

This commit is contained in:
Kegan Dougal 2020-05-22 12:59:34 +01:00
parent ec45bb7976
commit 35bcc152ea
1 changed files with 49 additions and 5 deletions
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54
src/vector/dendrite-sw.js
View File

@ -36,7 +36,39 @@ self.registration.addEventListener('updatefound', () => {
self.importScripts(`${bundle_path}/wasm_exec.js`,
`${bundle_path}/go_http_bridge.js`,
`${bundle_path}/sqlitejs.js`,
`${bundle_path}/localforage.js`)
`${bundle_path}/localforage.js`);
let isWriting = false;
async function writeDatabasesToIndexedDB() {
while (true) {
await sleep(1000 * 30);
try {
await syncfs(false);
}
catch (err) {
console.error("syncfs: failed to write to IDB:", err);
}
}
}
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
function syncfs(isStartup) {
console.log("syncfs isStartup=",isStartup);
return new Promise((resolve, reject) => {
global._go_sqlite.FS.syncfs(isStartup, function(err) {
if (err) {
console.error("syncfs failed:", err);
reject(err);
return;
}
console.log("syncfs OK");
resolve();
});
});
}
async function initDendrite() {
console.log(`dendrite-sw.js: v${version} SW init`)
@ -64,7 +96,22 @@ async function initDendrite() {
}
const go = new Go();
await sqlitejs.init(config)
await sqlitejs.init(config);
// periodically write databases to disk
if (!isWriting) {
isWriting = true;
// have to do this before we start dendrite for hopefully obvious reasons...
console.log("syncfs", global._go_sqlite.IDBFS);
global._go_sqlite.FS.mkdir("/idb");
//global._go_sqlite.FS.unmount("/");
console.log("syncfs at /idb mkdir ok");
global._go_sqlite.FS.mount(global._go_sqlite.IDBFS, {}, "/idb");
console.log("syncfs mounted");
await syncfs(true); // load from IDB
writeDatabasesToIndexedDB();
}
console.log(`dendrite-sw.js: v${version} starting dendrite.wasm...`)
const result = await WebAssembly.instantiateStreaming(fetch(`${bundle_path}/../../dendrite.wasm`), go.importObject)
go.run(result.instance).then(() => {
@ -83,9 +130,6 @@ async function initDendrite() {
console.log(`dendrite-sw.js: v${version} claiming open browser tabs`)
console.log("swjs: ", id," invoke self.clients.claim()")
self.clients.claim();
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
let serverIsUp = false;
for (let i = 0; i < 30; i++) { // 3s