fabric-network
Version:
SDK for writing node.js applications to interact with Hyperledger Fabric. This package encapsulates the APIs to connect to a Fabric network, submit transactions and perform queries against the ledger.
53 lines • 2.17 kB
JavaScript
;
/*
* Copyright 2018, 2020 IBM All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.SingleQueryHandler = void 0;
const fabricerror_1 = require("../../errors/fabricerror");
const util = require("util");
const Logger = require("../../logger");
const logger = Logger.getLogger('SingleQueryHandler');
class SingleQueryHandler {
constructor(peers) {
this.currentPeerIndex = 0;
logger.debug('constructor: peers=%j', peers.map((peer) => peer.name));
this.peers = peers;
}
async evaluate(query) {
const method = 'evaluate';
logger.debug('%s - start', method);
const startPeerIndex = this.currentPeerIndex;
const errorMessages = [];
for (let i = 0; i < this.peers.length; i++) {
const peerIndex = (startPeerIndex + i) % this.peers.length;
this.currentPeerIndex = peerIndex;
const peer = this.peers[peerIndex];
logger.debug('%s - sending to peer %s', method, peer.name);
const results = await query.evaluate([peer]);
const result = results[peer.name];
if (result instanceof Error) {
errorMessages.push(result.toString());
}
else {
if (result.isEndorsed) {
logger.debug('%s - return peer response status: %s', method, result.status);
return result.payload;
}
else {
logger.debug('%s - throw peer response status: %s message: %s', method, result.status, result.message);
const responseError = Object.assign(new Error('peer error response: ' + result.message), result);
throw responseError;
}
}
}
const message = util.format('Query failed. Errors: %j', errorMessages);
const error = new fabricerror_1.FabricError(message);
logger.error('evaluate:', error);
throw error;
}
}
exports.SingleQueryHandler = SingleQueryHandler;
//# sourceMappingURL=singlequeryhandler.js.map