OVER_QUERY_LIMIT in Google Maps API v3: How do I pause/delay in Javascript to slow it down?

Question

I'm hitting an issue that is WELL discussed in these forums, but none of the recommendations seem to be working for me so I'm looking for some full javascript that works when saved as an html file.

The issue is I keep hitting the OVER_QUERY_LIMIT error when trying to geocode > 11 locations on a Google Map using the V3 APIs called by Javascript. I understand that there is a limit to the rate at which you can call the geocoder (as well as the daily limit on total volume), so I need to introduce a pause in between each result in the array.

Any help very much appreciated.

Here is my code:

EDIT: This is what I've tried to do to get it to pause/wait in the relevant section, but it doesn't do anything:

function codeAddress(vPostCode) {
    if (geocoder) {
    while (wait) { /* Just wait. */ };
      geocoder.geocode( { 'address': "'" + vPostCode + "'"}, function(results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
          map.setCenter(results[0].geometry.location);
          var marker = new google.maps.Marker({
              map: map, 
              position: results[0].geometry.location
          });
        /* When geocoding "fails", see if it was because of over quota error: */
        } else if (status == google.maps.GeocoderStatus.OVER_QUERY_LIMIT) { 
        wait = true;
        setTimeout("wait = true", 2000);
        //alert("OQL: " + status);
        } else {
          alert("Geocode was not successful for the following reason: " + status);
        }
      });
    }
  }

user_11419809 · Answer

this post was made a while ago, but it provides an answer that did not solve the problem regarding reaching the limit of requests in an iteration for me, so I publish this, to help who else has not served.

My environment happened in Ionic 3.

Instead of making a "pause" in the iteration, I ocurred the idea of iterating with a timer, this timer has the particularity of executing the code that would go in the iteration, but will run every so often until it is reached the maximum count of the "Array" in which we want to iterate.

In other words, we will consult the Google API in a certain time so that it does not exceed the limit allowed in milliseconds.

// Code to start the timer
    this.count= 0;
    let loading = this.loadingCtrl.create({
      content: 'Buscando los mejores servicios...'
    });
    loading.present();
    this.interval = setInterval(() => this.getDistancias(loading), 40);

// Function that runs the timer, that is, query Google API
  getDistancias(loading){
    if(this.count>= this.datos.length){
      clearInterval(this.interval);
    } else {
      var sucursal = this.datos[this.count];
      this.calcularDistancia(this.posicion, new LatLng(parseFloat(sucursal.position.latitude),parseFloat(sucursal.position.longitude)),sucursal.codigo).then(distancia => {
    }).catch(error => {
      console.log('error');
      console.log(error);
    });
    }
    this.count += 1;
  }
  calcularDistancia(miPosicion, markerPosicion, codigo){
    return new Promise(async (resolve,reject) => {
      var service = new google.maps.DistanceMatrixService;
      var distance;
      var duration;
      service.getDistanceMatrix({
        origins: [miPosicion, 'salida'],
        destinations: [markerPosicion, 'llegada'],
        travelMode: 'DRIVING',
        unitSystem: google.maps.UnitSystem.METRIC,
        avoidHighways: false,
        avoidTolls: false
      }, function(response, status){
        if (status == 'OK') {
          var originList = response.originAddresses;
          var destinationList = response.destinationAddresses;
          try{
            if(response != null && response != undefined){
              distance = response.rows[0].elements[0].distance.value;
              duration = response.rows[0].elements[0].duration.text;
              resolve(distance);
            }
          }catch(error){
            console.log("ERROR GOOGLE");
            console.log(status);
          }
        }
      });
    });
  }

I hope this helps!

I'm sorry for my English, I hope it's not an inconvenience, I had to use the Google translator.

Regards, Leandro.

OVER_QUERY_LIMIT in Google Maps API v3: How do I pause/delay in Javascript to slow it down?

6 Answers