我想编写一个带有一些参数和一个Handler<E>
对象的函数。在基于其他参数进行一些计算之后,我需要在处理程序对象上返回结果。
为了更好地解释,我举了一个例子:
public void getPlaces(LatLong latLong, int redius, Collection<PlaceType> places)
{
if(redius <= 0 || redius > 50000)
{
throw new IllegalAccessError("redis can be 0 to 50000 meters only");
}
String uri = String.format(GOOGLE_PLACE_API_URI, latLong.getLatitude(), latLong.getLongitude(), redius, PROJECT_API_KEY, Joiner.on("|").join(places));
HttpClientRequest request = httpClient.getAbs(uri, response ->{
logger.info("Received response with status code={} message={}", response.statusCode(), response.statusMessage());
response.bodyHandler( buffer -> {
JsonObject result = buffer.toJsonObject();
String nextPageToken = result.getString("next_page_token");
JsonArray resultArray = result.getJsonArray("results");
System.out.println("nextPageToken="+nextPageToken+" result="+resultArray);
});
}).setTimeout(30000);
request.exceptionHandler(e -> {
logger.error("Caught exception while making request for google place APIs. Error message={} e=", e.getMessage(), e);
});
request.end();
}
public void getPlaces(LatLong latLong, int redius, Collection<PlaceType> places, Handler<JsonObject> response)
{
// COMPLETE THIS USING ABOVE FUNCTION
getPlaces(latLong, redius, places);
}
答案 0 :(得分:1)
我不确定你是否理解你的需要,但我想你想用你的计算结果来调用处理程序。所以这段代码应该做你想要的:
public void getPlaces(LatLong latLong, int redius, Collection<PlaceType> places, Handler<JsonObject> handler) {
if(redius <= 0 || redius > 50000) {
throw new IllegalAccessError("redis can be 0 to 50000 meters only");
}
String uri = String.format(GOOGLE_PLACE_API_URI, latLong.getLatitude(), latLong.getLongitude(), redius, PROJECT_API_KEY, Joiner.on("|").join(places));
HttpClientRequest request = httpClient.getAbs(uri, response ->{
logger.info("Received response with status code={} message={}", response.statusCode(), response.statusMessage());
response.bodyHandler( buffer -> {
JsonObject result = buffer.toJsonObject();
String nextPageToken = result.getString("next_page_token");
JsonArray resultArray = result.getJsonArray("results");
System.out.println("nextPageToken="+nextPageToken+" result="+resultArray);
handler.handle(result); // call the result handler
});
}).setTimeout(30000);
request.exceptionHandler(e -> {
logger.error("Caught exception while making request for google place APIs. Error message={} e=", e.getMessage(), e);
});
request.end();
}
希望这会有所帮助。