Examples of java.security.Policy.refresh()

java.security.Policy.refresh()
Refreshes/reloads the policy configuration. The behavior of this method depends on the implementation. For example, calling refresh on a file-based policy will cause the file to be re-read.
The default implementation of this method does nothing. This method should be overridden if a refresh operation is supported by the policy implementation.

     */
    protected final PermissionCollection getPermissions(CodeSource codeSource) {
        if (!policy_refresh) {
            // Refresh the security policies
            Policy policy = Policy.getPolicy();
            policy.refresh();
            policy_refresh = true;
        }
        String codeUrl = codeSource.getLocation().toString();
        PermissionCollection pc;
        if ((pc = (PermissionCollection)loaderPC.get(codeUrl)) == null) {

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        try {
            // The policy file may have been modified to adjust 
            // permissions, so we're reloading it when loading or 
            // reloading a Context
            Policy policy = Policy.getPolicy();
            policy.refresh();
        } catch (AccessControlException e) {
            // Some policy files may restrict this, even for the core,
            // so this exception is ignored
        }

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  {
    if (!policy_refresh)
    {
      // Refresh the security policies
      Policy policy = Policy.getPolicy();
      policy.refresh();
      policy_refresh = true;
    }
    String codeUrl = codeSource.getLocation().toString();
    PermissionCollection pc;
    if ((pc = (PermissionCollection) loaderPC.get(codeUrl)) == null)

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    {
      // The policy file may have been modified to adjust 
      // permissions, so we're reloading it when loading or 
      // reloading a Container
      Policy policy = Policy.getPolicy();
      policy.refresh();
    }
    catch (AccessControlException e)
    {
      // Some policy files may restrict this, even for the core,
      // so this exception is ignored

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    public static void refreshPolicy(File policyFile) {
        int idx = firstFreePolicyIndex();
        URI policyFileURI = policyFile.toURI();
        java.security.Security.setProperty("policy.url." + idx, policyFileURI.toASCIIString());
        Policy p = Policy.getPolicy();
        p.refresh();
    }
    
    /**
     *The methods below are duplicates from the com.sun.enterprise.appclient.jws.Util class.
     *At the time this class is running, Java Web Start will not yet permit the Util class to

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        try {
            // The policy file may have been modified to adjust 
            // permissions, so we're reloading it when loading or 
            // reloading a Context
            Policy policy = Policy.getPolicy();
            policy.refresh();
        } catch (AccessControlException e) {
            // Some policy files may restrict this, even for the core,
            // so this exception is ignored
        }

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        try {
            // The policy file may have been modified to adjust 
            // permissions, so we're reloading it when loading or 
            // reloading a Context
            Policy policy = Policy.getPolicy();
            policy.refresh();
        } catch (AccessControlException e) {
            // Some policy files may restrict this, even for the core,
            // so this exception is ignored
        }

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        try {
            // The policy file may have been modified to adjust 
            // permissions, so we're reloading it when loading or 
            // reloading a Context
            Policy policy = Policy.getPolicy();
            policy.refresh();
        } catch (AccessControlException e) {
            // Some policy files may restrict this, even for the core,
            // so this exception is ignored
        }

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        String policyProvider = System.getProperty("javax.security.jacc.policy.provider", JaccProvider.Policy.class.getName());
        try {
            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
            Class policyClass = Class.forName(policyProvider, true, classLoader);
            Policy policy = (Policy) policyClass.newInstance();
            policy.refresh();
            Policy.setPolicy(policy);
        } catch (Exception e) {
            throw new IllegalStateException("Could not install JACC Policy Provider: "+policyProvider, e);
        }
    }

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        try {
            // The policy file may have been modified to adjust 
            // permissions, so we're reloading it when loading or 
            // reloading a Context
            Policy policy = Policy.getPolicy();
            policy.refresh();
        } catch (AccessControlException e) {
            // Some policy files may restrict this, even for the core,
            // so this exception is ignored
        }

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