@Override
protected void internalInit() {
super.internalInit();
CommonHelper.assertNotBlank("casOAuthUrl", this.casOAuthUrl);
this.service = new ProxyOAuth20ServiceImpl(new CasOAuthWrapperApi20(this.casOAuthUrl,
this.springSecurityCompliant),
new OAuthConfig(this.key, this.secret, this.callbackUrl,
SignatureType.Header, null, null),
this.connectTimeout, this.readTimeout, this.proxyHost,
this.proxyPort, false, true);