BPEL wait for an event activity

Hi,
I have requirement for two scenarios ::
1. BPEL waiting for a business event (like event from EO's create /update / delete)
2. BPEL waiting in between for callback from other processes.
if #2 is possible, inherently I can achieve #1 by having another
mediator listen the event and invoke the callback. (Please suggest if
there is any better way)
Can any point me some links / documents for implementing above two scenarios.
Thanks & Regards,
Harish

Using Events.
I have a little zip of 2 BPEL processes which do precisely what you want. Unfortunately, these forums do not have attachment capability (at least what I can find)
I have sent the Zip archive to your email (in your forums id).

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Top user events:
Event Event Class % Event Avg Active Sessions
CPU + Wait for CPU CPU 80.88 98.15
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gc cr block busy Cluster 2.01 2.44
gc cr block 2-way Cluster 1.97 2.39
db file sequential read User I/O 1.81 2.20
Top SQL command type:
SQL Command Type Distinct SQLIDs % Activity Avg Active Sessions
PL/SQL EXECUTE 3 60.99 74.02
SELECT 66 12.90 15.65
INSERT 24 9.89 12.01
UPDATE 9 6.00 7.28
DELETE 2 1.33 1.61Rest of the SQL queries seem to be very optimum, but waits on pl/sql execute operation are causing very low tps.
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AWR report :
Header
DB      Name      DB Id           Instance      Inst num      Startup Time           Release RAC
FCR           1304316316      fcrypp1      1                01-12ÔÂ-12 04:12      11.2.0.2.0 YES
Host           Name Platform                     CPUs      Cores      Sockets Memory (GB)
z4ci2011      AIX-Based Systems (64-bit)      168      42        320.00
               Snap Id      Snap Time                     Sessions      Cursors/Session
Begin Snap: 40650           01-12ÔÂ-12 06:40:03      1203           5.8
End Snap:      40669           01-12ÔÂ-12 09:50:01      1122           5.3
Elapsed:        189.96 (mins)
DB Time:        22,251.65 (mins)
Load profile
Per Second           Per Transaction      Per Exec      Per Call
DB Time(s):           117.1                19.5                     0.00           3.89
DB CPU(s):                16.1                2.7                     0.00           0.53
Redo size:                12,759,186.3      2,126,361.0
Logical reads:           181,875.9           30,310.2
Block changes:           54,515.5           9,085.2
Physical reads:      1,340.3           223.4
Physical writes:      8,788.9           1,464.7
User calls:           30.1                5.0
Parses:                26.5                4.4
Hard parses:           0.4                0.1
W/A MB processed:      8.5                1.4
Logons:                0.1                0.0
Executes:                41,176.0           6,862.1
Rollbacks:                1.9                0.3
Transactions:           6.0
Time model statistics
Statistic Name                                             Time (s)          % of DB Time
sql execute elapsed time                              1,334,935.55     99.99
PL/SQL execution elapsed time                         1,180,376.60     88.41
DB CPU                                                       182,904.44          13.7
repeated bind elapsed time                              292.83               0.02
sequence load elapsed time                              279.75               0.02
parse time elapsed                                        87.4               0.01
hard parse elapsed time                                   22.52               0
failed parse elapsed time                              5.12               0
connection management call elapsed time               4.61               0
PL/SQL compilation elapsed time                         1.91               0
hard parse (sharing criteria) elapsed time          0.49               0
hard parse (bind mismatch) elapsed time               0.39               0
inbound PL/SQL rpc elapsed time                         0.1     0
DB time                                                       1,335,099.30
background elapsed time                                   33,298.67
background cpu time                                        11,692.76
Operating System Statistics
Statistic Value End Value
AVG_BUSY_TIME 202,428
AVG_IDLE_TIME 936,397
AVG_IOWAIT_TIME 4,124
AVG_SYS_TIME 84,480
AVG_USER_TIME 117,573
BUSY_TIME 34,074,303
IDLE_TIME 157,378,825
IOWAIT_TIME 755,368
SYS_TIME 14,256,010
USER_TIME 19,818,293
LOAD 21 10
OS_CPU_WAIT_TIME 23,770,800
VM_IN_BYTES 20,496
VM_OUT_BYTES 2,086,940,520
PHYSICAL_MEMORY_BYTES 343,597,383,680
NUM_CPUS 168
NUM_CPU_CORES 42
NUM_LCPUS 168
NUM_VCPUS 42
GLOBAL_RECEIVE_SIZE_MAX 41,943,040
GLOBAL_SEND_SIZE_MAX 41,943,040
TCP_RECEIVE_SIZE_DEFAULT 16,384
TCP_RECEIVE_SIZE_MAX 9,223,372,036,854,775,807
TCP_RECEIVE_SIZE_MIN 4,096
TCP_SEND_SIZE_DEFAULT 16,384
TCP_SEND_SIZE_MAX 9,223,372,036,854,775,807
TCP_SEND_SIZE_MIN 4,096
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CPU Time (s)      Executions      CPU per Exec (s) %Total      Elapsed Time (s)      %CPU      %IO      SQL Id SQL Module SQL Text
180,330.13           127                1,419.92                98.59      1,326,401.03           13.60      1.08      04kt8u64udphu    BEGIN :1 := ap_ch_eod_shell_en...
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Chilly Charly (aka CC)
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