(Java) Check PayPal Access Token Expiration

Checks to see if the PayPal access token expired.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // Note: Requires Chilkat v9.5.0.64 or greater.

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // In the example linked here: PayPal OAuth2 Token,
    // we fetched a PayPal access token and saved it to a JSON file.
    // We also recorded the current date/time.
    // Load this JSON file and compare the current date/time with the fetch date/time
    // and the "expires_in" value to see if the token is expired.

    CkJsonObject json = new CkJsonObject();
    boolean success = json.LoadFile("qa_data/tokens/paypal.json");
    if (success != true) {
        System.out.println("Failed to load access key json file.");
        return;
        }

    // Get the current date/time.
    CkDateTime dateTime = new CkDateTime();
    boolean bLocalTime = false;
    int dtNow = dateTime.GetAsUnixTime(bLocalTime);

    // Get the access token create date/time
    int dtCreate = json.IntOf("tokenCreateTimeUtc");

    // Find out how many seconds have elapsed.
    int numSeconds = dtNow - dtCreate;

    // Get the expires_in value from the JSON.
    int expires_in = json.IntOf("expires_in");

    System.out.println("token age (in seconds) = " + numSeconds);
    System.out.println("expires_in = " + expires_in);

    // If the token expired, or if it will expire in 5 minutes or less,
    // get another token.
    if (numSeconds < (expires_in - 300)) {
        System.out.println("The token is not yet expired.  No need to fetch another.");
        return;
        }

    System.out.println("Time to fetch a new access token...");

    // Get another token..
    // See the example at Get PayPal OAuth2 Token
    // to get another token..
  }
}