/doc/javadoc/mdfs/namenode/repositories/UserDataRepository.html

https://bitbucket.org/crholm/mdfs · HTML · 415 lines · 351 code · 44 blank · 20 comment · 0 complexity · a983977a7140f94531cb428b6ff66b6c MD5 · raw file 

    

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  7. UserDataRepository
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  58. &nbsp;<A HREF="../../../mdfs/namenode/repositories/MetaDataRepositoryNode.html" title="class in mdfs.namenode.repositories"><B>PREV CLASS</B></A>&nbsp;
    59. 

  59. &nbsp;<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories"><B>NEXT CLASS</B></A></FONT></TD>
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  61.   <A HREF="../../../index.html?mdfs/namenode/repositories/UserDataRepository.html" target="_top"><B>FRAMES</B></A>  &nbsp;
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  79.   SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;FIELD&nbsp;|&nbsp;CONSTR&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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  81. DETAIL:&nbsp;FIELD&nbsp;|&nbsp;CONSTR&nbsp;|&nbsp;<A HREF="#method_detail">METHOD</A></FONT></TD>
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  88. <!-- ======== START OF CLASS DATA ======== -->
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  89. <H2>
    90. 

  90. <FONT SIZE="-1">
    91. 

  91. mdfs.namenode.repositories</FONT>
    92. 

  92. <BR>
    93. 

  93. Class UserDataRepository</H2>
    94. 

  94. <PRE>
    95. 

  95. java.lang.Object
    96. 

  96.   <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>mdfs.namenode.repositories.UserDataRepository</B>
    97. 

  97. </PRE>
    98. 

  98. <HR>
    99. 

  99. <DL>
    100. 

  100. <DT><PRE>public class <B>UserDataRepository</B><DT>extends java.lang.Object</DL>
    101. 

  101. </PRE>
    102. 

  102. 

  103. <P>
    104. 

  104. UserDataRepository stores MDFS user data that correlates to the files, authentication and so on.
    105. 

  105.  It is a Singelton since it is a shared recorce and are synchronized via <CODE>ReentrantLock</CODE>
    106. 

  106.  for allowing multiple threads. When a lock is acquired all other operations on the UserDataRepository
    107. 

  107.  are locked. If the thread that holds the lock fails/craches, The lock will be unlocked.
    108. 

  108. <P>
    109. 

  109. 

  110. <P>
    111. 

  111. <DL>
    112. 

  112. <DT><B>Author:</B></DT>
    113. 

  113.   <DD>Rasmus Holm</DD>
    114. 

  114. </DL>
    115. 

  115. <HR>
    116. 

  116. 

  117. <P>
    118. 

  118. 

  119. <!-- ========== METHOD SUMMARY =========== -->
    120. 

  120. 

  121. <A NAME="method_summary"><!-- --></A>
    122. 

  122. <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
    123. 

  123. <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
    124. 

  124. <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
    125. 

  125. <B>Method Summary</B></FONT></TH>
    126. 

  126. </TR>
    127. 

  127. <TR BGCOLOR="white" CLASS="TableRowColor">
    128. 

  128. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    129. 

  129. <CODE>&nbsp;boolean</CODE></FONT></TD>
    130. 

  130. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#addUser(java.lang.String, java.lang.String)">addUser</A></B>(java.lang.String&nbsp;name,
    131. 

  131.         java.lang.String&nbsp;pass)</CODE>
    132. 

  132. 

  133. <BR>
    134. 

  134. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.</TD>
    135. 

  135. </TR>
    136. 

  136. <TR BGCOLOR="white" CLASS="TableRowColor">
    137. 

  137. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    138. 

  138. <CODE>&nbsp;boolean</CODE></FONT></TD>
    139. 

  139. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#addUser(mdfs.namenode.repositories.UserDataRepositoryNode)">addUser</A></B>(<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A>&nbsp;node)</CODE>
    140. 

  140. 

  141. <BR>
    142. 

  142. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.</TD>
    143. 

  143. </TR>
    144. 

  144. <TR BGCOLOR="white" CLASS="TableRowColor">
    145. 

  145. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    146. 

  146. <CODE>&nbsp;boolean</CODE></FONT></TD>
    147. 

  147. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#authUser(java.lang.String, java.lang.String)">authUser</A></B>(java.lang.String&nbsp;name,
    148. 

  148.          java.lang.String&nbsp;password)</CODE>
    149. 

  149. 

  150. <BR>
    151. 

  151. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Authenticates a user</TD>
    152. 

  152. </TR>
    153. 

  153. <TR BGCOLOR="white" CLASS="TableRowColor">
    154. 

  154. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    155. 

  155. <CODE>&nbsp;boolean</CODE></FONT></TD>
    156. 

  156. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#authUser(mdfs.namenode.repositories.UserDataRepositoryNode, java.lang.String)">authUser</A></B>(<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A>&nbsp;user,
    157. 

  157.          java.lang.String&nbsp;password)</CODE>
    158. 

  158. 

  159. <BR>
    160. 

  160. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Authenticates a user</TD>
    161. 

  161. </TR>
    162. 

  162. <TR BGCOLOR="white" CLASS="TableRowColor">
    163. 

  163. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    164. 

  164. <CODE>static&nbsp;<A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html" title="class in mdfs.namenode.repositories">UserDataRepository</A></CODE></FONT></TD>
    165. 

  165. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#getInstance()">getInstance</A></B>()</CODE>
    166. 

  166. 

  167. <BR>
    168. 

  168. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    169. 

  169. </TR>
    170. 

  170. <TR BGCOLOR="white" CLASS="TableRowColor">
    171. 

  171. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    172. 

  172. <CODE>&nbsp;<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A></CODE></FONT></TD>
    173. 

  173. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#getUser(java.lang.String)">getUser</A></B>(java.lang.String&nbsp;name)</CODE>
    174. 

  174. 

  175. <BR>
    176. 

  176. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Fetches the user from the repository</TD>
    177. 

  177. </TR>
    178. 

  178. <TR BGCOLOR="white" CLASS="TableRowColor">
    179. 

  179. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    180. 

  180. <CODE>&nbsp;void</CODE></FONT></TD>
    181. 

  181. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#load()">load</A></B>()</CODE>
    182. 

  182. 

  183. <BR>
    184. 

  184. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loads user data repository from permanent storage</TD>
    185. 

  185. </TR>
    186. 

  186. <TR BGCOLOR="white" CLASS="TableRowColor">
    187. 

  187. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    188. 

  188. <CODE>&nbsp;<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A></CODE></FONT></TD>
    189. 

  189. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#removeUser(java.lang.String)">removeUser</A></B>(java.lang.String&nbsp;name)</CODE>
    190. 

  190. 

  191. <BR>
    192. 

  192. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Removes a user from the repository.</TD>
    193. 

  193. </TR>
    194. 

  194. <TR BGCOLOR="white" CLASS="TableRowColor">
    195. 

  195. <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
    196. 

  196. <CODE>&nbsp;void</CODE></FONT></TD>
    197. 

  197. <TD><CODE><B><A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html#save()">save</A></B>()</CODE>
    198. 

  198. 

  199. <BR>
    200. 

  200. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Saves the repository to permanent storage</TD>
    201. 

  201. </TR>
    202. 

  202. </TABLE>
    203. 

  203. &nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
    204. 

  204. <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
    205. 

  205. <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
    206. 

  206. <TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
    207. 

  207. </TR>
    208. 

  208. <TR BGCOLOR="white" CLASS="TableRowColor">
    209. 

  209. <TD><CODE>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
    210. 

  210. </TR>
    211. 

  211. </TABLE>
    212. 

  212. &nbsp;
    213. 

  213. <P>
    214. 

  214. 

  215. <!-- ============ METHOD DETAIL ========== -->
    216. 

  216. 

  217. <A NAME="method_detail"><!-- --></A>
    218. 

  218. <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
    219. 

  219. <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
    220. 

  220. <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
    221. 

  221. <B>Method Detail</B></FONT></TH>
    222. 

  222. </TR>
    223. 

  223. </TABLE>
    224. 

  224. 

  225. <A NAME="getInstance()"><!-- --></A><H3>
    226. 

  226. getInstance</H3>
    227. 

  227. <PRE>
    228. 

  228. public static <A HREF="../../../mdfs/namenode/repositories/UserDataRepository.html" title="class in mdfs.namenode.repositories">UserDataRepository</A> <B>getInstance</B>()</PRE>
    229. 

  229. <DL>
    230. 

  230. <DD><DL>
    231. 

  231. 

  232. <DT><B>Returns:</B><DD>the instance of the UserDataRepository</DL>
    233. 

  233. </DD>
    234. 

  234. </DL>
    235. 

  235. <HR>
    236. 

  236. 

  237. <A NAME="addUser(mdfs.namenode.repositories.UserDataRepositoryNode)"><!-- --></A><H3>
    238. 

  238. addUser</H3>
    239. 

  239. <PRE>
    240. 

  240. public boolean <B>addUser</B>(<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A>&nbsp;node)</PRE>
    241. 

  241. <DL>
    242. 

  242. <DD>1. Adds a user in the form a <A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories"><CODE>UserDataRepositoryNode</CODE></A> to the Repository where the key is the username.
    243. 

  243.  2. Creates a home dir for the new user.
    244. 

  244.  3. Updates permanent storage with new user.
    245. 

  245. <P>
    246. 

  246. <DD><DL>
    247. 

  247. <DT><B>Parameters:</B><DD><CODE>node</CODE> - the UserDataRepository node to add to repositori
    248. 

  248. <DT><B>Returns:</B><DD>true if successful, false if it is preexisting</DL>
    249. 

  249. </DD>
    250. 

  250. </DL>
    251. 

  251. <HR>
    252. 

  252. 

  253. <A NAME="removeUser(java.lang.String)"><!-- --></A><H3>
    254. 

  254. removeUser</H3>
    255. 

  255. <PRE>
    256. 

  256. public <A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A> <B>removeUser</B>(java.lang.String&nbsp;name)</PRE>
    257. 

  257. <DL>
    258. 

  258. <DD>Removes a user from the repository.
    259. 

  259. <P>
    260. 

  260. <DD><DL>
    261. 

  261. <DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the user to be removed
    262. 

  262. <DT><B>Returns:</B><DD>the removed users</DL>
    263. 

  263. </DD>
    264. 

  264. </DL>
    265. 

  265. <HR>
    266. 

  266. 

  267. <A NAME="addUser(java.lang.String, java.lang.String)"><!-- --></A><H3>
    268. 

  268. addUser</H3>
    269. 

  269. <PRE>
    270. 

  270. public boolean <B>addUser</B>(java.lang.String&nbsp;name,
    271. 

  271.                        java.lang.String&nbsp;pass)</PRE>
    272. 

  272. <DL>
    273. 

  273. <DD>1. Adds a user in the form a <A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories"><CODE>UserDataRepositoryNode</CODE></A> but generated from name and pass to the Repository where the key is the username
    274. 

  274.  2. Creates a home dir for the new user.
    275. 

  275.  3. Updates permanent storage with new user.
    276. 

  276. <P>
    277. 

  277. <DD><DL>
    278. 

  278. <DT><B>Parameters:</B><DD><CODE>name</CODE> - the username of the new user<DD><CODE>pass</CODE> - the cleartext password of the new user
    279. 

  279. <DT><B>Returns:</B><DD>true if successful, false if it is preexisting</DL>
    280. 

  280. </DD>
    281. 

  281. </DL>
    282. 

  282. <HR>
    283. 

  283. 

  284. <A NAME="getUser(java.lang.String)"><!-- --></A><H3>
    285. 

  285. getUser</H3>
    286. 

  286. <PRE>
    287. 

  287. public <A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A> <B>getUser</B>(java.lang.String&nbsp;name)</PRE>
    288. 

  288. <DL>
    289. 

  289. <DD>Fetches the user from the repository
    290. 

  290. <P>
    291. 

  291. <DD><DL>
    292. 

  292. <DT><B>Parameters:</B><DD><CODE>name</CODE> - the username of the user that is requested
    293. 

  293. <DT><B>Returns:</B><DD>the user, null if  it dose not exist</DL>
    294. 

  294. </DD>
    295. 

  295. </DL>
    296. 

  296. <HR>
    297. 

  297. 

  298. <A NAME="authUser(java.lang.String, java.lang.String)"><!-- --></A><H3>
    299. 

  299. authUser</H3>
    300. 

  300. <PRE>
    301. 

  301. public boolean <B>authUser</B>(java.lang.String&nbsp;name,
    302. 

  302.                         java.lang.String&nbsp;password)</PRE>
    303. 

  303. <DL>
    304. 

  304. <DD>Authenticates a user
    305. 

  305. <P>
    306. 

  306. <DD><DL>
    307. 

  307. <DT><B>Parameters:</B><DD><CODE>name</CODE> - username as a String<DD><CODE>password</CODE> - clear text password
    308. 

  308. <DT><B>Returns:</B><DD>true if valid, false if wrong password</DL>
    309. 

  309. </DD>
    310. 

  310. </DL>
    311. 

  311. <HR>
    312. 

  312. 

  313. <A NAME="authUser(mdfs.namenode.repositories.UserDataRepositoryNode, java.lang.String)"><!-- --></A><H3>
    314. 

  314. authUser</H3>
    315. 

  315. <PRE>
    316. 

  316. public boolean <B>authUser</B>(<A HREF="../../../mdfs/namenode/repositories/UserDataRepositoryNode.html" title="class in mdfs.namenode.repositories">UserDataRepositoryNode</A>&nbsp;user,
    317. 

  317.                         java.lang.String&nbsp;password)</PRE>
    318. 

  318. <DL>
    319. 

  319. <DD>Authenticates a user
    320. 

  320. <P>
    321. 

  321. <DD><DL>
    322. 

  322. <DT><B>Parameters:</B><DD><CODE>user</CODE> - the node that the password is checked against<DD><CODE>password</CODE> - 
    323. 

  323. <DT><B>Returns:</B><DD>true if valid, false if wrong password</DL>
    324. 

  324. </DD>
    325. 

  325. </DL>
    326. 

  326. <HR>
    327. 

  327. 

  328. <A NAME="load()"><!-- --></A><H3>
    329. 

  329. load</H3>
    330. 

  330. <PRE>
    331. 

  331. public void <B>load</B>()</PRE>
    332. 

  332. <DL>
    333. 

  333. <DD>Loads user data repository from permanent storage
    334. 

  334. <P>
    335. 

  335. <DD><DL>
    336. 

  336. </DL>
    337. 

  337. </DD>
    338. 

  338. </DL>
    339. 

  339. <HR>
    340. 

  340. 

  341. <A NAME="save()"><!-- --></A><H3>
    342. 

  342. save</H3>
    343. 

  343. <PRE>
    344. 

  344. public void <B>save</B>()</PRE>
    345. 

  345. <DL>
    346. 

  346. <DD>Saves the repository to permanent storage
    347. 

  347. <P>
    348. 

  348. <DD><DL>
    349. 

  349. </DL>
    350. 

  350. </DD>
    351. 

  351. </DL>
    352. 

  352. <!-- ========= END OF CLASS DATA ========= -->
    353. 

  353. <HR>
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