1. Database-resident JVM
What, Where, How is it use and his potential

2. Agenda
– Database resident JVM
– Session Management
– Memory Management
– Security
– Oracle Commitment to Java in the Database
– What we heard at OOW San Francisco about 12c
– Case Study
●
Near Real Time Full Text Indexing
●
Analytic Tool for Enterprise Server Logs
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3. Database resident JVM
●
Available since Oracle 8i
●
Architecture
●
Robustness
●
Class sharing
●
Memory Management
●
Scalability
●
Performance
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4. Oracle JVM versus Sun’s JDK
Sun’s JDK VM OracleJVM
●
Thread Based ●
Database Session Model
●
Sharing across Threads ●
Session Isolation
●
Limited Scalability ●
Unlimited Scalability
●
Classes in file system ●
Classes in database
●
Resolve classes with ●
Resolve classes with
“Classpath” “Resolver Spec”
●
JIT ●
JIT (11g and up)
●
Preemptive multi-threading ●
Non-Preemptive
●
Limited Robustness (process multi-threading
failure) ●
Does not crash as a whole
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5. Database Sessions Imposed on Java
Within the context of a
session, the client
performs the following:
1)Connects to the database
and opens a session.
●
Runs Java within the
database. This is referred to
as a call
●
Continues to work within the
session, performing as
many calls as required
●
Ends the session
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6. Oracle JVM Class Sharing
Oracle
Database
Shared User Application Classes
Session
Session Session
Virtual JVM User
User Virtual JVM
Instance Statics User
Statics
Statics
Instance
System
Statics
… System
Statics
… System
Statics
Shared JVM System Classes
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7. Oracle JVM Memory Areas
●
Java Pool
Used by the Java class loader to allocates space for bytecodes and other
read-only class metadata; also Java states that are migrated from the Session
space at the end of call.
●
Session Space
Used for preserving the state of system objects, user objects, and metadata
used by the Java runtime; also used for end of call migration
●
New Space
Default memory area for allocating almost all Java objects, except large objects
●
Old Space
Used for holding long-lived or large objects (i.e., larger than 1-K Bytes) for the
duration of a call.
●
Run Space
Used for holding system objects (e.g., classloader objects) allocated for the
duration of a call.
●
Stack Space
Used to allocate system objects used by the interpreter
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8. OracleJVM Security
Strong Security combining database
security mechanisms with Java security
mechanisms
●
User authentication
●
Database-schema security
●
Login-user and effective-user security
●
Class resolution security
●
Java 2 security
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9. Oracle’s Commitment to OJVM
●
Used by a significant percentage of database customers
●
Used by Oracle Components
– InterMedia
– Spatial
– Text
– XQuery (XMLDB)
– WareHouse Builder
– CDC (Change Data Capture)
– ORE (Oracle R Enterprise – database resident)
– ODM (Oracle Data Mining analytics functions)
●
12c Enhancements
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10. Who is Using OJVM
●
Many among Fortune 500 companies
●
Some examples from
“Java in the Oracle Database @ Work – Customer Case Studies”
●
And for sure Scotas & Cima
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11. Java in the Database: What For
● Trigger-based Notification System using ● Implement Parsers for various File
RMI Formats (txt, zip, xml, binary)
● Secure Credit-Card Processing using JSSE ● Implement Image Transformation
● Custom Alert applications that monitor
and Format Conversion (GIF, PNG,
business data
JPEG, etc)
● Sending emails with attachment from
within the database ● Implement database-resident
● Produce PDF files from Result Set Content Management System
● Execute external OS commands and ● HTTP Call-Out
external procedures
● JDBC Call-Out
●
Implement Md5 CRC
● Publish Repository Content to Portal
● RMI Call-Out to SAP
● Portable Logistic Applications ● Web Services Call-Out
● Messaging across Tiers
● RESTful Database Web Services
● Near Real Time Full Text Search
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12. According to OOW SF presentation
●
JDK interchangeable at any time (Perl script)
●
Support for latest JDK
– 1.6 default
– 1.7
●
JNDI support
●
Logging support
●
In-database Hadoop (Map-Reduce)
●
Security enhancements
●
Fast switch from SQL-OJVM calls
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13. Case Study
Database resident JVM
Client Example
Scotas Near Real Time Full Text Searching
www.scotas.com

14. Scotas OLS
●
An Embedded version of Solr Framework running inside Oracle OracleJVM
● 42 new Java Classes and several new PLSQL Object Types
●
Two new domain index for Oracle Databases using Data Cartridge API (ODCI)
● A new Store implementation for Lucene (OJVMDirectory) which replaces a
traditional filesystem by Secure BLOB
●
Four new SQL operators scontains(), sscore(), smlt(), shighlight() and
poweful text analysis functionalities
●
An orthogonal/up-to-date Solr solution for any programming language, especially
Java, Ruby, Python, PHP and .Net, currently latest production version – 4.0.0.
● Available to any Oracle product such as BI, Apex, ODM
create index esl_events_sidx on esl_events(message) indextype is Lucene.SolrIndex
parameters('SyncMode:Deferred;MltColumn:text;HighlightColumn:title;DefaultColumn:text;Co
mmitOnSync:true;ExtraTabs:ESL.esl_causes
c;WhereCondition:L$MT.event_id=c.event_id(+);ExtraCols:.....') local parallel 2;
select /*+ DOMAIN_INDEX_SORT */ sscore(1),shighlight(1),message from
esl_events where scontains(message,'severity_s:(ERROR INFO) AND
springframework',1)>0 and gen_day between 26 and 27;
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15. What the NRT means?
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16. OLS Architecture
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17. Oracle Integrated Information Architecture Capabilities - Scotas OLS Integration
Data Acquire Organize Analyze Decide
Structured
Master & ETL/ELT
Reference
Reporting &
ODS Dashboards
DBMS
(OLTP) ChangeDC
Management, Security,
Alerting
Transactions
Semi-structured
EPM - BI
Warehouse
Real-Time
Governance
Files Applications
Machine
Generated
Scotas Search
Message- Streaming
Social Media NoSQL Based CEP Engine
Advanced
Unstructured
Analytics
In-Database
Text, Image, Hadoop
HDFS Analytics Visual
Video, Audio MapReduce
Discovery
Specialized Big Data High Speed RDBMS In Memory
Hardware Cluster Network Cluster Analytics
Source: Oracle Information Architecture: An Architect’s Guide to Big Data
An Oracle White Paper in Enterprise Architecture, March 2012
Figure 3: Oracle Integrated Information Architecture Capabilities
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18. • Product comparison
Bringing the best of both worlds
SCOTAS Oracle Solr Lucene
OLS Text
Real Time  
Scalability  
Performance  
Security  
Integration  
Flexible and  
Powerful
features
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19. Thank
You!
www.scotas.com | info@scotas.com | +1 (650) 704-7915 | 440 North Wolfe Road, Sunnyvale, CA 94085