Micrometer metrics exporter for apache http connection pool

gistfile1.txt

1. Create a scheduler to add new routes
@Scheduled(fixedRate = 300000)
    public void updateHttpRoutes() {
        Set<HttpRoute> routes = poolingHttpClientConnectionManager.getRoutes();
        for (HttpRoute route : routes) {
            httpMetricsTracker.add(route, poolingHttpClientConnectionManager);
        }
    }

public class HttpPoolStats {

private final HttpRoute httpRoute;
private final PoolingHttpClientConnectionManager poolingHttpClientConnectionManager;

public HttpPoolStats(HttpRoute httpRoute, PoolingHttpClientConnectionManager poolingHttpClientConnectionManager) {
    this.httpRoute = httpRoute;
    this.poolingHttpClientConnectionManager = poolingHttpClientConnectionManager;
}

public int getLeased() {
    return poolingHttpClientConnectionManager.getStats(httpRoute).getLeased();
}

public int getPending() {
    return poolingHttpClientConnectionManager.getStats(httpRoute).getPending();
}

public int getAvailable() {
    return poolingHttpClientConnectionManager.getStats(httpRoute).getAvailable();
}

public int getMax() {
    return poolingHttpClientConnectionManager.getStats(httpRoute).getMax();
}

}