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embark
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Updated online/offline event checks so they are run during initialisation. 

Changed the online event to `once` and set it to be bound every time the node goes offline.

The above changes handle the case where:
1) `embark run` runs and starts geth.
2) geth is killed manually
3) `embark blockchain` is run in separate process to restart geth
4) the `embark run` process detects this change and restarts the web3 provider and recompiles/deploys/builds

Every time `embark blochain` is restarted, an error is appended and all are emitted from the `eth-block-tracker`. This is a bug but can't figure out where it originates. The downside is that if, for example, `embark blockchain` is restarted 4 times, there will be 4 errors emitted from the `eth-block-tracker`. Because of this, errors emitted from `eth-block-tracker` have been reduced to trace to avoid clogging the logs.
This commit is contained in:
emizzle 2018-06-26 12:59:14 +10:00
parent fe22a40146
commit f67a807ac8
3 changed files with 21 additions and 11 deletions
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2
lib/cmds/blockchain/blockchain.js
View File

@ -168,7 +168,7 @@ Blockchain.prototype.run = function() {
console.log('Geth: ' + data);
});
self.child.on('exit', (code) => {
let strCode = '';
let strCode;
if (code) {
strCode = ' with error code ' + code;
} else {

22
lib/contracts/blockchain.js
View File

@ -73,6 +73,20 @@ class Blockchain {
if (!err) {
self.isWeb3Ready = true;
self.events.emit(WEB3_READY);
// if the ethereum node goes offline, we need a check to ensure
// the provider is also stopped
self.events.on('check:wentOffline:Ethereum', () => {
self.logger.trace('Ethereum went offline: stopping web3 provider...');
self.provider.stop();
// once the node goes back online, we can restart the provider
self.events.once('check:backOnline:Ethereum', () => {
self.logger.trace('Ethereum back online: starting web3 provider...');
self.provider.startWeb3Provider(() => {
self.logger.trace('web3 provider restarted after ethereum node came back online');
});
});
});
return next();
}
self.web3StartedInProcess = true;
@ -160,14 +174,6 @@ class Blockchain {
if (err && err !== NO_NODE) {
return cb(err);
}
else if ((statusObj && statusObj.status === 'off') || err === NO_NODE){
self.provider.stop();
self.events.on('check:backOnline:Ethereum', () => {
self.provider.startWeb3Provider(() => {
self.logger.trace('web3 provider restarted after ethereum node came back online');
});
});
}
cb(statusObj);
});
}, 5000, 'off');

8
lib/contracts/provider.js
View File

@ -39,8 +39,12 @@ class Provider {
// network connectivity error
self.engine.on('error', (err) => {
// report connectivity errors
self.logger.error(err);
// report connectivity errors as trace due to polling
self.logger.trace('web3 provider error: ', err);
self.logger.trace('stopping web3 provider due to error');
// prevent continuous polling errors
self.engine.stop();
});
self.engine.start();