semaphorecontrolledchannel.html

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<A NAME="SemaphoreControlledChannel(int)"><!-- --></A><H3>
SemaphoreControlledChannel</H3>
<PRE>
public <B>SemaphoreControlledChannel</B>(int&nbsp;capacity)
                           throws java.lang.IllegalArgumentException</PRE>
<DL>
<DD>Create a channel with the given capacity and default
 semaphore implementation
<P>

<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if capacity less or equal to zero</DL>
<HR>

<A NAME="SemaphoreControlledChannel(int, java.lang.Class)"><!-- --></A><H3>
SemaphoreControlledChannel</H3>
<PRE>
public <B>SemaphoreControlledChannel</B>(int&nbsp;capacity,
                                  java.lang.Class&nbsp;semaphoreClass)
                           throws java.lang.IllegalArgumentException,
                                  java.lang.NoSuchMethodException,
                                  java.lang.SecurityException,
                                  java.lang.InstantiationException,
                                  java.lang.IllegalAccessException,
                                  java.lang.reflect.InvocationTargetException</PRE>
<DL>
<DD>Create a channel with the given capacity and 
 semaphore implementations instantiated from the supplied class
<P>

<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if capacity less or equal to zero.
<DD><CODE>java.lang.NoSuchMethodException</CODE> - If class does not have constructor 
 that intializes permits
<DD><CODE>java.lang.SecurityException</CODE> - if constructor information 
 not accessible
<DD><CODE>java.lang.InstantiationException</CODE> - if semaphore class is abstract
<DD><CODE>java.lang.IllegalAccessException</CODE> - if constructor cannot be called
<DD><CODE>java.lang.reflect.InvocationTargetException</CODE> - if semaphore constructor throws an
 exception</DL>

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<A NAME="capacity()"><!-- --></A><H3>
capacity</H3>
<PRE>
public int <B>capacity</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/dbunit/util/concurrent/BoundedChannel.html" title="interface in org.dbunit.util.concurrent">BoundedChannel</A></CODE></B></DD>
<DD>Return the maximum number of elements that can be held.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/dbunit/util/concurrent/BoundedChannel.html#capacity()">capacity</A></CODE> in interface <CODE><A HREF="../../../../org/dbunit/util/concurrent/BoundedChannel.html" title="interface in org.dbunit.util.concurrent">BoundedChannel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the capacity of this channel.</DL>
</DD>
</DL>
<HR>

<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public int <B>size</B>()</PRE>
<DL>
<DD>Return the number of elements in the buffer.
 This is only a snapshot value, that may change
 immediately after returning.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="insert(java.lang.Object)"><!-- --></A><H3>
insert</H3>
<PRE>
protected abstract void <B>insert</B>(java.lang.Object&nbsp;x)</PRE>
<DL>
<DD>Internal mechanics of put.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="extract()"><!-- --></A><H3>
extract</H3>
<PRE>
protected abstract java.lang.Object <B>extract</B>()</PRE>
<DL>
<DD>Internal mechanics of take.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="put(java.lang.Object)"><!-- --></A><H3>
put</H3>
<PRE>
public void <B>put</B>(java.lang.Object&nbsp;x)
         throws java.lang.InterruptedException</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></B></DD>
<DD>Place item in the channel, possibly waiting indefinitely until
 it can be accepted. Channels implementing the BoundedChannel
 subinterface are generally guaranteed to block on puts upon
 reaching capacity, but other implementations may or may not block.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html#put(java.lang.Object)">put</A></CODE> in interface <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - the element to be inserted. Should be non-null.
<DT><B>Throws:</B>
<DD><CODE>java.lang.InterruptedException</CODE> - if the current thread has
 been interrupted at a point at which interruption
 is detected, in which case the element is guaranteed not
 to be inserted. Otherwise, on normal return, the element is guaranteed
 to have been inserted.</DL>
</DD>
</DL>
<HR>

<A NAME="offer(java.lang.Object, long)"><!-- --></A><H3>
offer</H3>
<PRE>
public boolean <B>offer</B>(java.lang.Object&nbsp;x,
                     long&nbsp;msecs)
              throws java.lang.InterruptedException</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></B></DD>
<DD>Place item in channel only if it can be accepted within
 msecs milliseconds. The time bound is interpreted in
 a coarse-grained, best-effort fashion.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html#offer(java.lang.Object, long)">offer</A></CODE> in interface <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - the element to be inserted. Should be non-null.<DD><CODE>msecs</CODE> - the number of milliseconds to wait. If less than
 or equal to zero, the method does not perform any timed waits,
 but might still require
 access to a synchronization lock, which can impose unbounded
 delay if there is a lot of contention for the channel.
<DT><B>Returns:</B><DD>true if accepted, else false
<DT><B>Throws:</B>
<DD><CODE>java.lang.InterruptedException</CODE> - if the current thread has
 been interrupted at a point at which interruption
 is detected, in which case the element is guaranteed not
 to be inserted (i.e., is equivalent to a false return).</DL>
</DD>
</DL>
<HR>

<A NAME="take()"><!-- --></A><H3>
take</H3>
<PRE>
public java.lang.Object <B>take</B>()
                      throws java.lang.InterruptedException</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></B></DD>
<DD>Return and remove an item from channel, 
 possibly waiting indefinitely until
 such an item exists.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html#take()">take</A></CODE> in interface <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>some item from the channel. Different implementations
  may guarantee various properties (such as FIFO) about that item
<DT><B>Throws:</B>
<DD><CODE>java.lang.InterruptedException</CODE> - if the current thread has
 been interrupted at a point at which interruption
 is detected, in which case state of the channel is unchanged.</DL>
</DD>
</DL>
<HR>

<A NAME="poll(long)"><!-- --></A><H3>
poll</H3>
<PRE>
public java.lang.Object <B>poll</B>(long&nbsp;msecs)
                      throws java.lang.InterruptedException</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></B></DD>
<DD>Return and remove an item from channel only if one is available within
 msecs milliseconds. The time bound is interpreted in a coarse
 grained, best-effort fashion.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html#poll(long)">poll</A></CODE> in interface <CODE><A HREF="../../../../org/dbunit/util/concurrent/Channel.html" title="interface in org.dbunit.util.concurrent">Channel</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>msecs</CODE> - the number of milliseconds to wait. If less than
  or equal to zero, the operation does not perform any timed waits,
 but might still require
 access to a synchronization lock, which can impose unbounded
 delay if there is a lot of contention for the channel.
<DT><B>Returns:</B><DD>some item, or null if the channel is empty.
<DT><B>Throws:</B>
<DD><CODE>java.lang.InterruptedException</CODE> - if the current thread has
 been interrupted at a point at which interruption
 is detected, in which case state of the channel is unchanged
 (i.e., equivalent to a null return).</DL>
</DD>
</DL>
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