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Avoid catching listener exceptions in Connection class

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This commit is contained in:
Chris Clark
2015-10-26 17:39:21 -07:00
parent ae439afaa4
commit 75a427ab27
1 changed files with 29 additions and 20 deletions
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49
src/api/common/connection.js
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@@ -24,30 +24,39 @@ class Connection extends EventEmitter {
this._nextRequestID = 1;
}
_onMessage(message) {
try {
const data = JSON.parse(message);
if (data.type === 'response') {
if (!(Number.isInteger(data.id) && data.id >= 0)) {
throw new UnexpectedError('valid id not found in response');
}
this.emit(data.id.toString(), data);
} else if (isStreamMessageType(data.type)) {
if (data.type === 'ledgerClosed') {
this._ledgerVersion = Number(data.ledger_index);
this._availableLedgerVersions.reset();
this._availableLedgerVersions.parseAndAddRanges(
data.validated_ledgers);
}
this.emit(data.type, data);
} else if (data.type === undefined && data.error) {
this.emit('error', data.error, data.error_message); // e.g. slowDown
} else {
throw new UnexpectedError('unrecognized message type: ' + data.type);
// return value is array of arguments to Connection.emit
_parseMessage(message) {
const data = JSON.parse(message);
if (data.type === 'response') {
if (!(Number.isInteger(data.id) && data.id >= 0)) {
throw new UnexpectedError('valid id not found in response');
}
return [data.id.toString(), data];
} else if (isStreamMessageType(data.type)) {
if (data.type === 'ledgerClosed') {
this._ledgerVersion = Number(data.ledger_index);
this._availableLedgerVersions.reset();
this._availableLedgerVersions.parseAndAddRanges(
data.validated_ledgers);
}
return [data.type, data];
} else if (data.type === undefined && data.error) {
return ['error', data.error, data.error_message]; // e.g. slowDown
}
throw new UnexpectedError('unrecognized message type: ' + data.type);
}
_onMessage(message) {
let parameters;
try {
parameters = this._parseMessage(message);
} catch (error) {
this.emit('error', 'badMessage', message);
return;
}
// we don't want this inside the try/catch or exceptions in listener
// will be caught
this.emit.apply(this, parameters);
}
get state() {