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Tatuya Kamada
wendelin
Commits
bc21eda3
Commit
bc21eda3
authored
Jul 30, 2015
by
Ivan Tyagov
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Allow to run transformations in parallel.
parent
38efc461
Changes
2
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2 changed files
with
50 additions
and
20 deletions
+50
-20
bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataStream_readChunkListAndTransform.xml
...ns/erp5_wendelin/DataStream_readChunkListAndTransform.xml
+10
-8
bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataStream_transform.xml
...eItem/portal_skins/erp5_wendelin/DataStream_transform.xml
+40
-12
No files found.
bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataStream_readChunkListAndTransform.xml
View file @
bc21eda3
...
@@ -55,18 +55,18 @@
...
@@ -55,18 +55,18 @@
"""\n
"""\n
Simply a wrapper to real method.\n
Simply a wrapper to real method.\n
"""\n
"""\n
data_stream = context
\n
\n
total_stream_length =
data_stream
.getSize()\n
total_stream_length =
context
.getSize()\n
\n
\n
if start >
total_stream_length:\n
if start >
total_stream_length:\n
# end reached\n
# end reached\n
return\n
return\n
\n
\n
data_stream_chunk_list =
data_stream
.readChunkList(start, end)\n
data_stream_chunk_list =
context
.readChunkList(start, end)\n
\n
\n
# do call transformation script\n
# do call transformation script\n
if transform_script_id is not None:\n
if transform_script_id is not None:\n
transform_script = getattr(
data_stream
, transform_script_id, None)\n
transform_script = getattr(
context
, transform_script_id, None)\n
if transform_script is not None:\n
if transform_script is not None:\n
start, end = transform_script(context, data_stream_chunk_list, \\\n
start, end = transform_script(context, data_stream_chunk_list, \\\n
start, \\\n
start, \\\n
...
@@ -77,7 +77,7 @@ if transform_script_id is not None:\n
...
@@ -77,7 +77,7 @@ if transform_script_id is not None:\n
# [warning] store current position offset in Data Stream, this can cause easily \n
# [warning] store current position offset in Data Stream, this can cause easily \n
# ConflictErrors and it spawns re-index activities on DataStream. Thus \n
# ConflictErrors and it spawns re-index activities on DataStream. Thus \n
# disable for now.\n
# disable for now.\n
#
data_stream
.setIntOffsetIndex(end)\n
#
context
.setIntOffsetIndex(end)\n
\n
\n
# start another read in another activity\n
# start another read in another activity\n
start += chunk_length\n
start += chunk_length\n
...
@@ -87,13 +87,15 @@ if end > total_stream_length:\n
...
@@ -87,13 +87,15 @@ if end > total_stream_length:\n
# no read beyond end of stream\n
# no read beyond end of stream\n
end = total_stream_length\n
end = total_stream_length\n
\n
\n
# some bytes left ...\n
if recursive:\n
data_stream.activate().DataStream_readChunkListAndTransform( \\\n
# some bytes left ...\n
context.activate().DataStream_readChunkListAndTransform( \\\n
start, \\\n
start, \\\n
end, \\\n
end, \\\n
chunk_length, \\\n
chunk_length, \\\n
transform_script_id,\\\n
transform_script_id,\\\n
data_array_reference,\\\n
data_array_reference,\\\n
recursive = recursive, \\\n
**kw)\n
**kw)\n
...
@@ -101,7 +103,7 @@ data_stream.activate().DataStream_readChunkListAndTransform( \\\n
...
@@ -101,7 +103,7 @@ data_stream.activate().DataStream_readChunkListAndTransform( \\\n
</item>
</item>
<item>
<item>
<key>
<string>
_params
</string>
</key>
<key>
<string>
_params
</string>
</key>
<value>
<string>
start, end, chunk_length, transform_script_id=None, data_array_reference=None, **kw
</string>
</value>
<value>
<string>
start, end, chunk_length, transform_script_id=None, data_array_reference=None,
recursive=1,
**kw
</string>
</value>
</item>
</item>
<item>
<item>
<key>
<string>
id
</string>
</key>
<key>
<string>
id
</string>
</key>
...
...
bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataStream_transform.xml
View file @
bc21eda3
...
@@ -50,27 +50,55 @@
...
@@ -50,27 +50,55 @@
</item>
</item>
<item>
<item>
<key>
<string>
_body
</string>
</key>
<key>
<string>
_body
</string>
</key>
<value>
<string>
""" \n
<value>
<string
encoding=
"cdata"
>
<![CDATA[
Read entire stream using activities and pass stream\'s data to handler script\n
who can transform it.\n
""" \n
Read entire stream using activities either in a sequence or in a oarallel mode.\n
Pass stream\'s data to handler script who can transform it.\n
Parameters:\n
Parameters:\n
* transform_script_id - the script which will transform data\n
* transform_script_id - the script which will transform data\n
* chunk_length - the length of a chunk\n
* chunk_length - the length of a chunk\n
* data_array_reference - the reference of the output Data Array\n
* parallelize - try to transform in parallel or not, in this case\n
developer must carefully choose chunk_length to match record (s) size\n
"""\n
"""\n
start = 0\n
start = 0\n
end = chunk_length\n
end = chunk_length\n
context.activate().DataStream_readChunkListAndTransform( \\\n
if not parallelize:\n
# sequential case\n
context.activate().DataStream_readChunkListAndTransform( \\\n
start, \\\n
start, \\\n
end, \\\n
end, \\\n
chunk_length, \\\n
chunk_length, \\\n
transform_script_id, \\\n
transform_script_id, \\\n
data_array_reference,\\\n
data_array_reference,\\\n
recursive =1, \\\n
**kw)\n
**kw)\n
</string>
</value>
else:\n
# parallel case\n
total_size = context.getSize()\n
while total_size >
start:\n
start += chunk_length + 1\n
end += chunk_length +1\n
if end > total_size:\n
end = total_size\n
\n
# call transformation in an activity\n
context.activate(activity=\'SQLQueue\').DataStream_readChunkListAndTransform( \\\n
start, \\\n
end, \\\n
chunk_length, \\\n
transform_script_id, \\\n
data_array_reference,\\\n
recursive = 0, \\\n
**kw)\n
]]>
</string>
</value>
</item>
</item>
<item>
<item>
<key>
<string>
_params
</string>
</key>
<key>
<string>
_params
</string>
</key>
<value>
<string>
chunk_length=1048576, transform_script_id=None, data_array_reference=None, **kw
</string>
</value>
<value>
<string>
chunk_length=1048576, transform_script_id=None, data_array_reference=None,
parallelize=0,
**kw
</string>
</value>
</item>
</item>
<item>
<item>
<key>
<string>
id
</string>
</key>
<key>
<string>
id
</string>
</key>
...
...
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