Mercurial > hg > blitz_condensed
annotate src/EDU/oswego/cs/dl/util/concurrent/Puttable.java @ 28:4b2f23b6feca
Add a schema compatibility check to indexer that parallels storage.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:11:15 +0100 |
parents | 3dc0c5604566 |
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1 /* |
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2 File: Puttable.java |
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3 |
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4 Originally written by Doug Lea and released into the public domain. |
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5 This may be used for any purposes whatsoever without acknowledgment. |
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6 Thanks for the assistance and support of Sun Microsystems Labs, |
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7 and everyone contributing, testing, and using this code. |
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8 |
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9 History: |
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10 Date Who What |
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11 11Jun1998 dl Create public version |
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12 */ |
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13 |
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14 package EDU.oswego.cs.dl.util.concurrent; |
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15 |
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16 /** |
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17 * This interface exists to enable stricter type checking |
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18 * for channels. A method argument or instance variable |
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19 * in a producer object can be declared as only a Puttable |
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20 * rather than a Channel, in which case a Java compiler |
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21 * will disallow take operations. |
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22 * <p> |
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23 * Full method descriptions appear in the Channel interface. |
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24 * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>] |
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25 * @see Channel |
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26 * @see Takable |
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27 **/ |
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28 |
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29 public interface Puttable { |
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30 |
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31 |
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32 /** |
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33 * Place item in the channel, possibly waiting indefinitely until |
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34 * it can be accepted. Channels implementing the BoundedChannel |
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35 * subinterface are generally guaranteed to block on puts upon |
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36 * reaching capacity, but other implementations may or may not block. |
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37 * @param item the element to be inserted. Should be non-null. |
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38 * @exception InterruptedException if the current thread has |
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39 * been interrupted at a point at which interruption |
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40 * is detected, in which case the element is guaranteed not |
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41 * to be inserted. Otherwise, on normal return, the element is guaranteed |
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42 * to have been inserted. |
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43 **/ |
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44 public void put(Object item) throws InterruptedException; |
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45 |
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46 |
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47 /** |
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48 * Place item in channel only if it can be accepted within |
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49 * msecs milliseconds. The time bound is interpreted in |
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50 * a coarse-grained, best-effort fashion. |
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51 * @param item the element to be inserted. Should be non-null. |
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52 * @param msecs the number of milliseconds to wait. If less than |
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53 * or equal to zero, the method does not perform any timed waits, |
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54 * but might still require |
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55 * access to a synchronization lock, which can impose unbounded |
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56 * delay if there is a lot of contention for the channel. |
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57 * @return true if accepted, else false |
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58 * @exception InterruptedException if the current thread has |
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59 * been interrupted at a point at which interruption |
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60 * is detected, in which case the element is guaranteed not |
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61 * to be inserted (i.e., is equivalent to a false return). |
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62 **/ |
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63 public boolean offer(Object item, long msecs) throws InterruptedException; |
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64 } |