46
47 public class rmiURLContextFactory implements ObjectFactory {
48
49 public Object getObjectInstance(Object urlInfo, Name name,
50 Context nameCtx, Hashtable<?,?> env)
51 throws NamingException
52 {
53 if (urlInfo == null) {
54 return (new rmiURLContext(env));
55 } else if (urlInfo instanceof String) {
56 return getUsingURL((String)urlInfo, env);
57 } else if (urlInfo instanceof String[]) {
58 return getUsingURLs((String[])urlInfo, env);
59 } else {
60 throw (new ConfigurationException(
61 "rmiURLContextFactory.getObjectInstance: " +
62 "argument must be an RMI URL String or an array of them"));
63 }
64 }
65
66 private static Object getUsingURL(String url, Hashtable env)
67 throws NamingException
68 {
69 rmiURLContext urlCtx = new rmiURLContext(env);
70 try {
71 return urlCtx.lookup(url);
72 } finally {
73 urlCtx.close();
74 }
75 }
76
77 /*
78 * Try each URL until lookup() succeeds for one of them.
79 * If all URLs fail, throw one of the exceptions arbitrarily.
80 * Not pretty, but potentially more informative than returning null.
81 */
82 private static Object getUsingURLs(String[] urls, Hashtable env)
83 throws NamingException
84 {
85 if (urls.length == 0) {
86 throw (new ConfigurationException(
87 "rmiURLContextFactory: empty URL array"));
88 }
89 rmiURLContext urlCtx = new rmiURLContext(env);
90 try {
91 NamingException ne = null;
92 for (int i = 0; i < urls.length; i++) {
93 try {
94 return urlCtx.lookup(urls[i]);
95 } catch (NamingException e) {
96 ne = e;
97 }
98 }
99 throw ne;
100 } finally {
101 urlCtx.close();
102 }
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46
47 public class rmiURLContextFactory implements ObjectFactory {
48
49 public Object getObjectInstance(Object urlInfo, Name name,
50 Context nameCtx, Hashtable<?,?> env)
51 throws NamingException
52 {
53 if (urlInfo == null) {
54 return (new rmiURLContext(env));
55 } else if (urlInfo instanceof String) {
56 return getUsingURL((String)urlInfo, env);
57 } else if (urlInfo instanceof String[]) {
58 return getUsingURLs((String[])urlInfo, env);
59 } else {
60 throw (new ConfigurationException(
61 "rmiURLContextFactory.getObjectInstance: " +
62 "argument must be an RMI URL String or an array of them"));
63 }
64 }
65
66 private static Object getUsingURL(String url, Hashtable<?,?> env)
67 throws NamingException
68 {
69 rmiURLContext urlCtx = new rmiURLContext(env);
70 try {
71 return urlCtx.lookup(url);
72 } finally {
73 urlCtx.close();
74 }
75 }
76
77 /*
78 * Try each URL until lookup() succeeds for one of them.
79 * If all URLs fail, throw one of the exceptions arbitrarily.
80 * Not pretty, but potentially more informative than returning null.
81 */
82 private static Object getUsingURLs(String[] urls, Hashtable<?,?> env)
83 throws NamingException
84 {
85 if (urls.length == 0) {
86 throw (new ConfigurationException(
87 "rmiURLContextFactory: empty URL array"));
88 }
89 rmiURLContext urlCtx = new rmiURLContext(env);
90 try {
91 NamingException ne = null;
92 for (int i = 0; i < urls.length; i++) {
93 try {
94 return urlCtx.lookup(urls[i]);
95 } catch (NamingException e) {
96 ne = e;
97 }
98 }
99 throw ne;
100 } finally {
101 urlCtx.close();
102 }
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