1 /*

     2  * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 //

    25 

    26 import java.io.*;

    27 import java.util.*;

    28 

    29 

    30 public class Load {

    31 

    32     private static PrintStream out = System.err;

    33 

    34     public static void main(String[] args) throws Exception {

    35 

    36         boolean installedOnly = false;

    37 

    38         List<String> expected = new ArrayList<String>(Arrays.asList(args));

    39         if (!expected.isEmpty() && expected.get(0).equals("-i")) {

    40             expected.remove(0);

    41             installedOnly = true;

    42         }

    43         if (expected.isEmpty())

    44             throw new Exception("usage: Load [-i] ( fail | provider-class-name )*");

    45 

    46         ServiceLoader<FooService> sl = (installedOnly

    47                                         ? ServiceLoader.loadInstalled(FooService.class)

    48                                         : ServiceLoader.load(FooService.class));

    49         out.format("%s%n", sl);

    50         Iterator<FooService> sli = sl.iterator();

    51         Iterator<String> ei = expected.iterator();

    52 

    53         for (;; ei.remove()) {

    54             FooService fp = null;

    55             try {

    56                 if (!sli.hasNext())

    57                     break;

    58                 fp = sli.next();

    59             } catch (ServiceConfigurationError x) {

    60                 if (ei.next().equals("fail")) {

    61                     out.format("Failed as expected: %s%n", x);

    62                     continue;

    63                 }

    64                 throw x;

    65             }

    66             String ec = ei.next();

    67             if (!fp.getClass().getName().equals(ec))

    68                 throw new

    69                     Exception(String.format("Wrong provider %s; expected %s",

    70                                             fp.getClass().getName(), ec));

    71             out.format("Provider found: %s%n", fp.getClass().getName());

    72         }

    73 

    74         if (ei.hasNext())

    75             throw new Exception("Missing providers: " + expected);

    76 

    77     }

    78 

    79 }