@Test
    public void testMultiByteCommitMessageOnAssetUpdate() throws Exception {
        Repository repository = new VFSRepository(producer.getIoService());
        ((VFSRepository)repository).setDescriptor(descriptor);
        profile.setRepository(repository);
        AssetBuilder builder = AssetBuilderFactory.getAssetBuilder(Asset.AssetType.Text);
        builder.content("custom editors content")
                .type("bpmn2")
                .name("testprocess")
                .location("/defaultPackage");
        String id = repository.createAsset(builder.getAsset());

        // setup parameters
        Map<String, String> params = new HashMap<String, String>();

        params.put("profile", "jbpm");
        params.put("action", "updateasset");
        params.put("assetid", id);
        params.put("assetcontent", "testprocess");
        params.put("commitmessage", "こんにちは世界");

        boolean processAssetExists = repository.assetExists("/defaultPackage/testprocess.bpmn2");
        assertTrue(processAssetExists);

        AssetServiceServlet assetServiceServlet = new AssetServiceServlet();
        assetServiceServlet.setProfile(profile);

        assetServiceServlet.init(new TestServletConfig(new TestServletContext(repository)));
        TestHttpServletResponse response = new  TestHttpServletResponse();
        assetServiceServlet.doPost(new TestHttpServletRequest(params), response);

        assertEquals("こんにちは世界", assetServiceServlet.getCommitMessage());
    }











private String commitMessage;
req.setCharacterEncoding("UTF-8");

 public String getCommitMessage() {
        return commitMessage;
    }