FM / src

/var/www/qr4y.com/server/delivery/node_modules/@grpc/grpc-js/src/

/var/www/qr4y.com/server/delivery/node_modules/@grpc/grpc-js/src

Name	Size	Mode	Actions
generated/	-	0755	rm
admin.ts	1345	0644	edit dl rm
backoff-timeout.ts	4719	0644	edit dl rm
call-credentials-filter.ts	3003	0644	edit dl rm
call-credentials.ts	6412	0644	edit dl rm
call-stream.ts	29012	0644	edit dl rm
call.ts	5444	0644	edit dl rm
channel-credentials.ts	8753	0644	edit dl rm
channel-options.ts	3249	0644	edit dl rm
channel.ts	30310	0644	edit dl rm
channelz.ts	26226	0644	edit dl rm
client-interceptors.ts	18100	0644	edit dl rm
client.ts	24233	0644	edit dl rm
compression-algorithms.ts	682	0644	edit dl rm
compression-filter.ts	10186	0644	edit dl rm
connectivity-state.ts	699	0644	edit dl rm
constants.ts	1651	0644	edit dl rm
deadline-filter.ts	3358	0644	edit dl rm
duration.ts	1096	0644	edit dl rm
events.ts	1108	0755	edit dl rm
experimental.ts	1317	0644	edit dl rm
filter-stack.ts	2687	0644	edit dl rm
filter.ts	1801	0644	edit dl rm
http_proxy.ts	8827	0644	edit dl rm
index.ts	7850	0644	edit dl rm
load-balancer-child-handler.ts	4863	0644	edit dl rm
load-balancer-outlier-detection.ts	22695	0644	edit dl rm
load-balancer-pick-first.ts	15910	0644	edit dl rm
load-balancer-round-robin.ts	7581	0644	edit dl rm
load-balancer.ts	7483	0644	edit dl rm
logging.ts	3407	0644	edit dl rm
make-client.ts	7201	0644	edit dl rm
max-message-size-filter.ts	3155	0644	edit dl rm
metadata.ts	9035	0644	edit dl rm
object-stream.ts	2214	0644	edit dl rm
picker.ts	4685	0644	edit dl rm
resolver-dns.ts	12970	0644	edit dl rm
resolver-ip.ts	3556	0644	edit dl rm
resolver-uds.ts	1611	0644	edit dl rm
resolver.ts	5802	0644	edit dl rm
resolving-load-balancer.ts	11443	0644	edit dl rm
server-call.ts	25825	0644	edit dl rm
server-credentials.ts	2822	0644	edit dl rm
server.ts	32396	0644	edit dl rm
service-config.ts	10544	0644	edit dl rm
status-builder.ts	1780	0755	edit dl rm
stream-decoder.ts	3501	0755	edit dl rm
subchannel-address.ts	2198	0644	edit dl rm
subchannel-interface.ts	2643	0644	edit dl rm
subchannel-pool.ts	5380	0644	edit dl rm
subchannel.ts	35173	0644	edit dl rm
tls-helpers.ts	1088	0644	edit dl rm
uri-parser.ts	2814	0644	edit dl rm

Edit: /var/www/qr4y.com/server/delivery/node_modules/@grpc/grpc-js/src/load-balancer-round-robin.ts (7581B)

/*
 * Copyright 2019 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

import {
  LoadBalancer,
  ChannelControlHelper,
  LoadBalancingConfig,
  registerLoadBalancerType,
} from './load-balancer';
import { ConnectivityState } from './connectivity-state';
import {
  QueuePicker,
  Picker,
  PickArgs,
  CompletePickResult,
  PickResultType,
  UnavailablePicker,
} from './picker';
import {
  SubchannelAddress,
  subchannelAddressToString,
} from './subchannel-address';
import * as logging from './logging';
import { LogVerbosity } from './constants';
import { ConnectivityStateListener, SubchannelInterface } from './subchannel-interface';

const TRACER_NAME = 'round_robin';

function trace(text: string): void {
  logging.trace(LogVerbosity.DEBUG, TRACER_NAME, text);
}

const TYPE_NAME = 'round_robin';

class RoundRobinLoadBalancingConfig implements LoadBalancingConfig {
  getLoadBalancerName(): string {
    return TYPE_NAME;
  }

constructor() {}

toJsonObject(): object {
    return {
      [TYPE_NAME]: {},
    };
  }

// eslint-disable-next-line @typescript-eslint/no-explicit-any
  static createFromJson(obj: any) {
    return new RoundRobinLoadBalancingConfig();
  }
}

class RoundRobinPicker implements Picker {
  constructor(
    private readonly subchannelList: SubchannelInterface[],
    private nextIndex = 0
  ) {}

pick(pickArgs: PickArgs): CompletePickResult {
    const pickedSubchannel = this.subchannelList[this.nextIndex];
    this.nextIndex = (this.nextIndex + 1) % this.subchannelList.length;
    return {
      pickResultType: PickResultType.COMPLETE,
      subchannel: pickedSubchannel,
      status: null,
      extraFilterFactories: [],
      onCallStarted: null,
    };
  }

/**
   * Check what the next subchannel returned would be. Used by the load
   * balancer implementation to preserve this part of the picker state if
   * possible when a subchannel connects or disconnects.
   */
  peekNextSubchannel(): SubchannelInterface {
    return this.subchannelList[this.nextIndex];
  }
}

interface ConnectivityStateCounts {
  [ConnectivityState.CONNECTING]: number;
  [ConnectivityState.IDLE]: number;
  [ConnectivityState.READY]: number;
  [ConnectivityState.SHUTDOWN]: number;
  [ConnectivityState.TRANSIENT_FAILURE]: number;
}

export class RoundRobinLoadBalancer implements LoadBalancer {
  private subchannels: SubchannelInterface[] = [];

private currentState: ConnectivityState = ConnectivityState.IDLE;

private subchannelStateListener: ConnectivityStateListener;

private subchannelStateCounts: ConnectivityStateCounts;

private currentReadyPicker: RoundRobinPicker | null = null;

constructor(private readonly channelControlHelper: ChannelControlHelper) {
    this.subchannelStateCounts = {
      [ConnectivityState.CONNECTING]: 0,
      [ConnectivityState.IDLE]: 0,
      [ConnectivityState.READY]: 0,
      [ConnectivityState.SHUTDOWN]: 0,
      [ConnectivityState.TRANSIENT_FAILURE]: 0,
    };
    this.subchannelStateListener = (
      subchannel: SubchannelInterface,
      previousState: ConnectivityState,
      newState: ConnectivityState
    ) => {
      this.subchannelStateCounts[previousState] -= 1;
      this.subchannelStateCounts[newState] += 1;
      this.calculateAndUpdateState();

if (
        newState === ConnectivityState.TRANSIENT_FAILURE ||
        newState === ConnectivityState.IDLE
      ) {
        this.channelControlHelper.requestReresolution();
        subchannel.startConnecting();
      }
    };
  }

private calculateAndUpdateState() {
    if (this.subchannelStateCounts[ConnectivityState.READY] > 0) {
      const readySubchannels = this.subchannels.filter(
        (subchannel) =>
          subchannel.getConnectivityState() === ConnectivityState.READY
      );
      let index = 0;
      if (this.currentReadyPicker !== null) {
        index = readySubchannels.indexOf(
          this.currentReadyPicker.peekNextSubchannel()
        );
        if (index < 0) {
          index = 0;
        }
      }
      this.updateState(
        ConnectivityState.READY,
        new RoundRobinPicker(readySubchannels, index)
      );
    } else if (this.subchannelStateCounts[ConnectivityState.CONNECTING] > 0) {
      this.updateState(ConnectivityState.CONNECTING, new QueuePicker(this));
    } else if (
      this.subchannelStateCounts[ConnectivityState.TRANSIENT_FAILURE] > 0
    ) {
      this.updateState(
        ConnectivityState.TRANSIENT_FAILURE,
        new UnavailablePicker()
      );
    } else {
      this.updateState(ConnectivityState.IDLE, new QueuePicker(this));
    }
  }

private updateState(newState: ConnectivityState, picker: Picker) {
    trace(
      ConnectivityState[this.currentState] +
        ' -> ' +
        ConnectivityState[newState]
    );
    if (newState === ConnectivityState.READY) {
      this.currentReadyPicker = picker as RoundRobinPicker;
    } else {
      this.currentReadyPicker = null;
    }
    this.currentState = newState;
    this.channelControlHelper.updateState(newState, picker);
  }

private resetSubchannelList() {
    for (const subchannel of this.subchannels) {
      subchannel.removeConnectivityStateListener(this.subchannelStateListener);
      subchannel.unref();
      this.channelControlHelper.removeChannelzChild(subchannel.getChannelzRef());
    }
    this.subchannelStateCounts = {
      [ConnectivityState.CONNECTING]: 0,
      [ConnectivityState.IDLE]: 0,
      [ConnectivityState.READY]: 0,
      [ConnectivityState.SHUTDOWN]: 0,
      [ConnectivityState.TRANSIENT_FAILURE]: 0,
    };
    this.subchannels = [];
  }

updateAddressList(
    addressList: SubchannelAddress[],
    lbConfig: LoadBalancingConfig
  ): void {
    this.resetSubchannelList();
    trace(
      'Connect to address list ' +
        addressList.map((address) => subchannelAddressToString(address))
    );
    this.subchannels = addressList.map((address) =>
      this.channelControlHelper.createSubchannel(address, {})
    );
    for (const subchannel of this.subchannels) {
      subchannel.ref();
      subchannel.addConnectivityStateListener(this.subchannelStateListener);
      this.channelControlHelper.addChannelzChild(subchannel.getChannelzRef());
      const subchannelState = subchannel.getConnectivityState();
      this.subchannelStateCounts[subchannelState] += 1;
      if (
        subchannelState === ConnectivityState.IDLE ||
        subchannelState === ConnectivityState.TRANSIENT_FAILURE
      ) {
        subchannel.startConnecting();
      }
    }
    this.calculateAndUpdateState();
  }

exitIdle(): void {
    for (const subchannel of this.subchannels) {
      subchannel.startConnecting();
    }
  }
  resetBackoff(): void {
    /* The pick first load balancer does not have a connection backoff, so this
     * does nothing */
  }
  destroy(): void {
    this.resetSubchannelList();
  }
  getTypeName(): string {
    return TYPE_NAME;
  }
}

export function setup() {
  registerLoadBalancerType(
    TYPE_NAME,
    RoundRobinLoadBalancer,
    RoundRobinLoadBalancingConfig
  );
}

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