com.mangopay.core.AuthorizationTokenManager Maven / Gradle / Ivy
package com.mangopay.core;
import com.mangopay.core.interfaces.StorageStrategy;
import com.mangopay.core.APIs.ApiBase;
import com.mangopay.MangoPayApi;
import java.security.*;
import java.math.*;
/**
* Authorization token manager. This class cannot be inherited.
*/
public final class AuthorizationTokenManager extends ApiBase {
private StorageStrategy storageStrategy;
/**
* Instantiates new AuthorizationTokenManager object.
* @param root Root/parent instance that holds the OAuthToken and Configuration instances.
*/
public AuthorizationTokenManager(MangoPayApi root) {
super(root);
this.registerCustomStorageStrategy(new DefaultStorageStrategy());
}
/**
* Gets the current authorization token.
*
* In the very first call, this method creates a new token before returning.
* If currently stored token is expired, this method creates a new one.
* @return Valid OAuthToken instance.
* @throws Exception
*/
public OAuthToken getToken() throws Exception {
OAuthToken token = storageStrategy.get(getEnvKey());
if (token == null || token.IsExpired()) {
storeToken(this.root.getAuthenticationManager().createToken());
}
return storageStrategy.get(getEnvKey());
}
/**
* Stores authorization token passed as an argument in the underlying storage strategy implementation.
* @param token Token instance to be stored.
*/
public void storeToken(OAuthToken token) {
storageStrategy.store(token, getEnvKey());
}
/**
* Registers custom storage strategy implementation.
*
* By default, the DefaultStorageStrategy instance is used.
* There is no need to explicitly call this method until some more complex
* storage implementation is needed.
* @param customStorageStrategy StorageStrategy interface implementation.
*/
public void registerCustomStorageStrategy(StorageStrategy customStorageStrategy) {
storageStrategy = customStorageStrategy;
}
private String getEnvKey() {
String input = root.getConfig().getBaseUrl() + root.getConfig().getClientId() + root.getConfig().getClientPassword();
String md5 = "";
try {
MessageDigest m = MessageDigest.getInstance("MD5");
m.update(input.getBytes(), 0, input.length());
md5 = new BigInteger(1,m.digest()).toString(16);
}
catch (NoSuchAlgorithmException nsaex) {
/* Intentionally suppress exception here, as MD5 algorithm for sure exists. */
}
return md5;
}
}