How to use Jython to send a dynamic HTML table email from ODI (part 2/2)


Hey guys how are you? I hope you guys are not insane after this 2 months of quarantine. Anyway, is time for us to finish the send email job. In the previous post HERE I explained the Jython code and the HTML code that we need to use to create our HTML table in our email. Today we’ll going to do it become dynamic.

As we saw, for every row we want it we need to have a block of HTML code that will draw the table, color the table and write the content of the cell in our table. We need this to change dynamically if we want to be useful for us, and to do that we need to write a SQL code to create this HTML code for us.

In my case I generate this code here to be my header:

<TR>
<TH COLSPAN="16" ALIGN="CENTER">Restatements Control - Group ID: 1</TH>
</TR>
<TR>
      <TH>Session Name</TH>
      <TH>Interface Name</TH>
      <TH>Year</TH>
      <TH>Feb</TH>
      <TH>Mar</TH>
      <TH>Apr</TH>
      <TH>May</TH>
      <TH>Jun</TH>
      <TH>Jul</TH>
      <TH>Aug</TH>
      <TH>Sep</TH>
      <TH>Oct</TH>
      <TH>Nov</TH>
      <TH>Dec</TH>
      <TH>Jan</TH>
      <TH>Adj</TH>
</TR>

This is saying that I’ll have 16 columns (COLSPAN=”16″) with Center alignment and the name of the table will be “Restatements Control – Group ID: 1” (where the 1 will be dynamically generated as well).

Now we first need to write a query to get this info for us. Since this is a very project related query, I don’t think it’ll do any good for you guys to put my query here, but I’ll explain what I was looking for. First I’m querying the ALL_TAB_PARTITIONS to get all partitions related with that table. Then I was querying a control table that every time the jobs run, it inserts in this table the period loaded, if there’s errors or not, the log folder path and the interface that run the job.

After that I do a FULL OUTER JOIN between this 2 tables to see all partitions I have and how many of these partitions were already executed. Next I PIVOT the information to get a table like data and the results is similar to this:

I created some simple Status code to make easy to manipulate later. NP is “No Partition”, N is “Never Run”, Y is “Warning”, R is “Error” and G is “Success”. Also, when is Y or R I have the Log Path associated with that run, this way the users can click and go to the log folder of that execution.

In my case this is important because this is for an restatement process where the business want to restate the entire past and we have millions of rows per partition, and they want flexibility to run as fit. Then we need to track the executions over time.

Now, the only thing that needs to be done is to convert this information in HTML code. This is easy since we just need to concatenate strings all over the place. Let’s see how I have done it:

The result is one big string for each row the query results. Each column was concatenated with a “Enter” between than, so when this code is used, we’ll have proper indentation for readability. This is the query I used to concatenate everything:

SELECT  '</TR>'||'
        '||'<TR ALIGN="CENTER">'||'
        '||'<TD>'||SESSION_NAME||'</TD>'||'
        '||'<TD>'||INTERFACE_NAME||'</TD>'||'
        '||'<TD>'||YEAR||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(FEB, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(FEB, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(FEB, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(FEB, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(MAR, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(MAR, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(MAR, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(MAR, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(APR, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(APR, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(APR, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(APR, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(MAY, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(MAY, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(MAY, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(MAY, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(JUN, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(JUN, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(JUN, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(JUN, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(JUL, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(JUL, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(JUL, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(JUL, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(AUG, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(AUG, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(AUG, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(AUG, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(SEP, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(SEP, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(SEP, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(SEP, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(OCT, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(OCT, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(OCT, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(OCT, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(NOV, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(NOV, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(NOV, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(NOV, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(DEC, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(DEC, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(DEC, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(DEC, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(JAN, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(JAN, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(JAN, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(JAN, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
        '||'<TD bgcolor='||DECODE(REGEXP_SUBSTR(ADJ, '[^|]+', 1, 1), 'R', '"#FC6456">', 'Y', '"#FCDB56">', 'G', '"#56FC6C">', 'NP', '"#FFFFFF">', 'N','"#8ABDFF">')||
        DECODE(REGEXP_SUBSTR(ADJ, '[^|]+', 1, 1),'Y','<a href="file:///'||REGEXP_SUBSTR(ADJ, '[^|]+', 1, 2)||'">Log</a>','R','<a href="file:///'||REGEXP_SUBSTR(ADJ, '[^|]+', 1, 2)||'">Log</a>')||'</TD>'||'
'||'</TR>' AS SCRIPT

Basically is a lot of DECODE’s to convert my STATUS code in colors and some REGEXP to split the STATUS from the Log path. That’s it for SQL. Now the only problem we have is that this is a very big string and the only way for us to store this is to use a PL/SQL because inside a PL/SQL a Varchar2 (32767 bytes) variable is bigger than inside SQL (4000 bytes).

We just need to create a simple PL/SQL to insert and concatenate all this rows into a CLOB that is a little big bigger (4 GB). To do that we just need to do something like this:

DECLARE
 
CURSOR C_HTML_TAG IS

	SQL HERE;
 
V_HTML_BODY CLOB;
 
BEGIN
 
    FOR DADOS IN C_HTML_TAG LOOP
      V_HTML_BODY := V_HTML_BODY || TO_CLOB(DADOS.SCRIPT);
    END LOOP;
              
    INSERT INTO FDM_ODI_RUN.TMP_HTML_BODY_DW (HTML_BODY) VALUES (V_HTML_BODY);
              
END;

That’s it, now for the easy part, use it in ODI. To do so we’ll have a command in the SOURCE querying the TMP_HTML_BODY table and then we’ll pass #SCRIPT info to our Jython target code:

import smtplib
 
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
 
mailFrom = "#FROM_MAIL"
mailSend = "#ADMIN_MAIL"
 
msg = MIMEMultipart()
msg['Subject'] = "Restatements Control (<%=odiRef.getContext("CTX_NAME")%>)"
msg['From'] = mailFrom
msg['To'] = mailSend
 
 
html = """\
<!DOCTYPE html>
<html>
  <head></head>
  <body>
  <TABLE style="float: left;margin-left:10px" BORDER="1"  WIDTH="80%" CELLPADDING="1" CELLSPACING="1">
   <TR>
     <TH COLSPAN="5" ALIGN="CENTER">Legend</TH>
   </TR>
    <TR>
        <TR ALIGN="CENTER">
        <TH WIDTH="20%" bgcolor="#FC6456">Error</TH>
        <TH WIDTH="20%" bgcolor="#FCDB56">Warning</TH>
        <TH WIDTH="20%" bgcolor="#56FC6C">Success</TH>
        <TH WIDTH="20%" bgcolor="#FFFFFF">No Existing Partition</TH>
        <TH WIDTH="20%" bgcolor="#8ABDFF">Not Loaded Yet</TH>
    </TR>
    </TABLE>
<TABLE style="float: left;margin-left:10px" BORDER="1" WIDTH="80%"  CELLPADDING="1" CELLSPACING="1">
   <TR>
     <TH COLSPAN="16" ALIGN="CENTER">Restatements Control - Group ID: #GROUP_ID</TH>
   </TR>
<TR>
      <TH>Session Name</TH>
      <TH>Interface Name</TH>
      <TH>Year</TH>
      <TH>Feb</TH>
      <TH>Mar</TH>
      <TH>Apr</TH>
      <TH>May</TH>
      <TH>Jun</TH>
      <TH>Jul</TH>
      <TH>Aug</TH>
      <TH>Sep</TH>
      <TH>Oct</TH>
      <TH>Nov</TH>
      <TH>Dec</TH>
      <TH>Jan</TH>
      <TH>Adj</TH>
   </TR>

   #SCRIPT

</TABLE>
  </body>
</html>
"""
 
part = MIMEText(html, 'html')
msg.attach(part)
 
s = smtplib.SMTP('#SMTP_SVR')
 
s.sendmail(mailFrom, mailSend.split(','), msg.as_string())
 
s.quit()

ODI will than replace the SCRIPT with all HTML code we created and will turn this into a generic HTML table and send it by email using Jython.

I hope you guys enjoy it and see you soon.

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