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annotate src/EDU/oswego/cs/dl/util/concurrent/Puttable.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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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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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 }