The Java Application Monitor (JAMon) is a free, simple, high performance, thread safe, Java API that allows developers to easily monitor production applications. Here is a link to a short video that gives an overview of JAMon.
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- JAMon allows developers to track their applications performance and behavior using predefined modules. There are modules that automatically monitor : SQL, HTTP page requests, Spring beans, method invocations, Log4j, and Exceptions. Other modules are often easy to build.
- JAMon keeps track of the following metrics for any of the items it tracks in the modules: hits, total, average, min, max and concurrency (average, max, current/active) to name a few.
- JAMon is fast and doesn't consume much memory and so it is suitable for production environments.
- JAMon statistics, stack traces and more are viewable from the JAMon war, JMX and are also accessible via the JAMon API.
In addition to using modules developers can monitor anything the modules don't cover by using JAMon's simple API methods 'start/stop' and 'add'.
Of course nobody wants to litter their code with calls to add and stop, so when possible JAMon monitoring modules should be used as they allow the easiest monitoring. JAMon was developed primarily for monitoring web applications, however JAMon can be used in any JDK 1.6 or higher environment.
Feel free to continue reading the user's guide or download JAMon and read the Java Docs. The following is a screen snapshot of jamonadmin.jsp from the JAMon WAR. It gives an idea of the type of information JAMon collects such as metrics on: SQL, JDBC, http page requests, http status codes, garbage collections, and exceptions.
Monitoring your application
JAMon comes with several ways to monitor your application that require no application code changes. Usually all that is required is to..
- add a line to an xml file,
- put the jamon jar file in your classpath,
- and install the JAMon war to view JAMon metrics/monitors (or you can view the metrics in a JMX console like jconsole).
Maven
JAMon is on Maven. The Maven pom dependency follows (substitute the appropriate version):Quick Links
JAMon Modules - The following links show how to enable monitoring with JAMon's preconfigured modules:
- HTTP Monitoring - Monitor requests/responses to Tomcat, Jetty, JBoss or any other JAVA web container. Track page execution times, status codes, bytes sent, exceptions thrown and more. Alternatively if you would like to monitor only your Web app and not the whole server you can use the JAMonFilter servlet filter or easily create your own.
- Spring Monitoring - Monitor any Spring bean. Track method invocations, arguments passed to methods, and exceptions thrown.
- JDBC/SQL monitoring - via the JAMon JDBC proxy driver (works with any other JDBC driver). Track SQL called, JDBC method calls, exceptions thrown and more.
- Log4j Monitoring - Monitor via the JAMon log4j Appender. Track counts for ERROR, INFO, WARNING etc. 'Tail' the Log4j log from the JAMon web application
- EJB3 Monitoring - Monitor EJBs using the JAMon EJB interceptor.
- Interface Monitoring - Monitor any class implementing a Java interface. As this capability requires code changes it is best to use other forms of method monitoring such as AOP, or EJB monitoring if they are available. Like these approaches interface monitoring tracks method performance and thrown exceptions.
Features - The following contain links to useful JAMon features:
- JAMon WAR - View & manage JAMon data with the JAMon web application
- JAMon JMX - View JAMon data in a JMX tool like jconsole and visualvm. (2.80+)
- GC metrics - View metrics associated with JVM garbage collections
- Distributed Application Monitoring - View all the data from your organizations applications from a central monitoring web application (the JAMon web application).
Videos - Short YouTube tutorials showing how to use JAMon
- JAMon 101 - An intro video to JAMon. Shows how to use start/stop/add and also other highlights of using JAMon.
- JAMon GUI - Shows how to access the information in JAMon via the JAMon WAR. Also shows data captured by the JAMon servlet filter and JDBC Proxy driver.
- JAMon Operating System monitoring - Monitor your unix/linux/mac scripts with JAMon. Introduced in JAMon 2.72.
API - start/stop methods
MonitorFactory.start('myLabel'); - The start/stop methods time any code that they surround.
'myFirstMonitorLabel' can be replaced by strings that represent..- Page names - '/mydirectory/myfantasticpage.jsp'
- SQL statements - 'select * from myawesometable'
- or anything else you would like to time.
JAMon keeps the label and units as a key in a Map and every time start or add are called with the same key JAMon updates statistics for: hits, total, average, min, max and concurrency (average, max, current/active) to name a few.
API - add method
MonitorFactory.add('myLabel', 'myUnits', myValue); - Sometimes developers are interested in counting the frequency of items (such as exceptions, or page requests with a certain status code). In addition they are interested in measuring other concepts such as how many bytes are sent/received, or how much free memory there is. JAMon provides the 'add' method to handle these situations.
JAMon keeps the label and units as a key in a Map and every time start or add are called with the same key JAMon updates statistics for: hits, total, average, min, max and concurrency (average, max, current/active) to name a few.
Link to another simple example.
API - Capturing details/context
MonitorFactory.add(new MonKeyImp(label, details, units), myValue); - An alternative way of calling JAMon start/stop or add methods is to pass in an explicit key. The advantage of passing in the key (MonKey) is that you can also pass in 'details'. 'details' can can be any context information that is useful information fo the developer. For example a stacktrace, method arguments, or http parameters could be passed in.
JAMon typically deals with aggregate data, however the power of JAMonListeners. all data passed in as a 'detail' can later be viewed via the JAMon web application. To get more information about this capability see JAMonListener example.
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JAMon License Agreement
JAMon has a very liberal license. The spirit of the license is that there are no restrictions on its use. Should something notbe clear in the license please to contact admin@jamonapi.com. In general JAMon binaries can be used free of charge in anysoftware (commercial software too), and JAMon source code may be modified.The JAMon License was adapted from the BSD license.
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Information
These links provide quick access to many of NCEI's climate and weather datasets, products, and various web pages and resources.
* Access to online data (online meaning available through our website for online delivery) are available at no charge. Some orders could be subject to a certification, consultation fee or handling charge. See the notes at the bottom of this page.
| 1. U.S. Local Climatological Data | ||
|---|---|---|
Description: Hourly, daily, and monthly climatic data for many U.S. cities | ||
| Local Climatological Data (LCD) | Sample | Period of Record for Station Certification charges apply |
| Global-Hourly File Access | Sample | Period of Record for Station |
| QCLCD ASCII Files | Sample | QCLCD ASCII Files are no longer available. Please use the Global-Hourly File Access link above. |
| Edited Monthly (Online LCD) | Sample | Certification charges apply Available through 2017 (No New LCD Publications after 2017) |
| Edited Annual (Online LCD Annual) | Sample | Certification charges apply |
Additional Information: Certified DataDVDStation ListOffline Options Back to the top Period of record: Varies by station
| 2. Global Historical Climatology Network - (GHCN) | ||
|---|---|---|
| Description: Formatted and/or ASCII output of data types, which includes daily, monthly, and yearly temperature, precipitation, and snow records over global land areas; includes Cooperative Observer Program (COOP) data | ||
| GHCN-Daily | Sample | Standard PDF, custom CSV, or custom text file |
| Global Summary of the Month | Sample | Standard PDF or custom CSV |
| Global Summary of the Year | Sample | Standard PDF or custom CSV |
| Individual Station Original | Sample | Original COOP forms (PDF) |
| GHCN-Daily FTP Access | Sample | Data files via FTP |
| GHCN-Monthly File Access | Sample | Data files |
| GHCN-Yearly File Access | Sample | Data files |
| Additional Information: Certified DataOffline Options Please Note: Certified copies of the original 'COOP' forms (item 3 above) may be purchased by visiting the IPS system. As of Jan 2012,GHCN-Daily is now the official archive. As of Dec 2016, GHCN-Monthly and GHCN-Yearly are now in the offical archive. | ||
| Back to the top | Period of record: 1800s–Current Certification charges apply |
| 3. Integrated Surface Database (ISD), Hourly, Global | ||
|---|---|---|
Description: Digital dataset of detailed hourly observational climate data for thousands of locations worldwide | ||
| Global Hourly (ISD) | Sample | Offline Options: $140 and up |
| ISD FTP Access | Complete dataset, archival format only | |
| Additional Information: Metadata/SoftwareStation HistoryDVDQCOffline Options | ||
| Back to the top | Period of record: 1901–Current |
| 4. U.S. Climate Normals Products | |
|---|---|
| Description: Long-term climatic averages and extremes for U.S. locations | |
| 1981–2010 Climate Normals Data Access | Monthly, daily, annual/seasonal, and hourly Normals for 1981–2010 |
| 1971–2000 Normals Products Page | Monthly, daily, and annual Normals for 1971–2000 |
| Additional Information: Offline Options The new 1981–2010 Normals (daily, monthly, hourly, annual/seasonal) are also available from the Climate Data Online system. | |
| Back to the top | Period of record: 1971–Current |
| 5.Storm Data Publication/Database | ||
|---|---|---|
| Description: Severe weather reports on damages, injuries, deaths, and more for U.S. locations | ||
| Storm Data (final) | Sample | Available online |
| NCEI Storm Events Database | Search engine tool for severe weather events by location (currently only 2006 forward) | |
| NOAA's Severe Weather Data Inventory | System providing the ability to search records covering a particular time period and geographic region Download formats currently supported are Shapefile (for GIS), KMZ (for Google Earth), CSV (comma-separated), and XML | |
| Additional Information: DVDOffline Options | ||
| Back to the top | Period of record: 1950–Current |
| 6. Climatological Data Publication | ||
|---|---|---|
| Description: Daily and monthly climatic data for hundreds of locations within a U.S. state | ||
| Individual Monthly Issue | Sample | Available online |
| Individual Annual Issue | Sample | Available online |
| Additional Information: DVDOffline Options | ||
| Back to the top | Period of record: 1890–Current |
| 7. Hourly Precipitation Data Publication/Database | ||
|---|---|---|
| Description: Collection of 15_minute and hourly precipitation data for many locations within a U.S. state | ||
| 15 Minute Precipitation | Sample | Climate Data Online Search Data ended December 31, 2013. |
| Hourly Precipitation | ||
| Hourly Precipitation File Access | Data Files (Version 2) 1948 to Present | |
| Individual Monthly Issue | Sample | Available online (December 2012 Final Issue) |
| Individual Annual/Dec. Issue | Available online (December 2012 Final Issue) | |
| Rainfall Frequency Atlas | The National Weather Service's (NWS) Hydrometeorological Design Studies Center (HDSC) prepares precipitation frequency estimates for the federal government and provides related documents on this site | |
| Additional Information: DVDOffline Options | ||
| Back to the top | Period of record: 1951–Current |
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| 8. Weather Maps/Charts | ||
|---|---|---|
| Description: National Weather Service charts archived at NCEI | ||
| Analysis and Forecast Charts | Sample | Certification charges apply |
| Additional Information: Offline Options | ||
| Back to the top | Period of record: 1948–Current |
| 9. Comparative Climatic Data (CCD) | ||
|---|---|---|
| Description: Climatic averages and extremes for major U.S. cities. | ||
| CCD Publication | Sample | Available online |
| Additional Information: Offline Options | ||
| Back to the top | Period of record: Varies |
| 10. Climatic Wind Data Publication | |
|---|---|
| Description: Climatic wind data from NCEI's LCD publication, U.S. Air Force climatic briefs, and more | |
| Climatic Wind Data for the U.S. | Available online |
| Additional Information: Offline Options | |
| Back to the top | Period of record: Varies, but generally 1930–1996 |
| 11. Climate Maps of the United States | ||
|---|---|---|
| Description: Various long-term climatic data depicted on U.S. maps | ||
| CLIMAPS—PDF or ESRI | Sample | Available online |
| Selected Maps Publication | Sample | $10 for published set of 20 maps |
| Additional Information: CD-ROM VersionOffline Options | ||
| Back to the top | Period of record: 1961–1990 |
| 12. CD-ROMs/DVDs | |
|---|---|
| Description: A listing of all available CD-ROMs and DVDs from NCEI | |
| Catalog | Available for online ordering, delivered by first class mail |
| Additional Information: Offline Options | |
| Back to the top | Period of record: Varies by dataset |
| 13. Climate at a Glance (National, Regional, Statewide, Divisional) | |
|---|---|
| Description: Derived from U.S. station data, including the cooperative network, into monthly composite means by climate division | |
| Climate at a Glance | This interactive tool provides historical information on precipitation and temperature for selected places, from cities to states to climate regions to the contiguous United States. A menu-driven system provides the history and trend for each place. Annual data can be further broken down by month and by season. |
| History of the US Climate Divisional dataset | Includes history, references and discovery tool |
| Climate Indices FTP Access | Available online Includes temperature, precipitation, and drought indices by year-month (FTP Access) |
| Additional Information: Offline Options | |
| Back to the top | Period of record: 1895–Present |
| 14. Global Summary of the Day (GSOD) | ||
|---|---|---|
| Description: Global daily climatic data | ||
| Global Summary of the Day | Sample | Available online Access to Global Summary of the Data (GSOD) data is transitioning from Climate Data Online v.1 to the Common Access system before May 1, 2020. |
| Additional Information: Offline Options | ||
| Back to the top | Period of record: Varies, as far back as 1930, and in some cases to the present |
| 15. U.S. Historical Climatology Network (USHCN) | |
|---|---|
| Description: The USHCN consists primarily of long-term COOP stations whose monthly temperature records have been adjusted for systematic, nonclimatic changes that bias temperature trends | |
| U.S. Historical Climatology Data | Available online |
| Additional Information: Offline Options | |
| Back to the top | Period of record: Varies, as far back as 1900, and in some cases to the present |
| 16. U.S. Climate Reference Network (USCRN) | |
|---|---|
| Description: Hourly observations from the 114+ USCRN stations | |
| USCRN Hourly Observations | Available online |
| Additional Information: Offline Options | |
| Back to the top | Period of record: 2004 - Present |
| 17. Regional Climate Centers/National Weather Service Products | |
|---|---|
| Description: Climate products from NOAA's RCCs and NWS | |
| National Weather Service (NWS) | Current National Weather Service Products |
| Regional Climate Center (RCCs) | NOAA's Regional Climate Centers |
| American Association of State Climatologists | Access to State Climatologists |
| Additional Information: Offline Options | |
| Back to the top | Period of record: Varies |
| 18. Various Webpage Resources | |
|---|---|
| Description: Additional information sources from the NCEI website | |
| Frost Shallow Foundations | Climatic data for frost protected shallow foundations (FPSF) |
| Extreme Weather | NCEI's extreme weather events page |
| Products and Services Guide | Guide to most NCEI products and services |
| Calculators and Conversion Tables | Temperature, wind chill, heat index, relative humidity, wind speed, and station pressure |
| Additional Information: Offline Options | |
| Back to the top | Period of record: Varies |
*Notes
- Online access to most online data (online meaning available through our website for online delivery) is free.
- The period of record shown indicates the period of data available online. The period of record for the complete dataset may vary and is dependent on the desired location. Data prior to the period of record indicated may be available. The NCEI archives contain data as far back as the 1800s for certain data types and locations. Contact NCEI for availability, pricing, and ordering information.
- Any data product ordered from NCEI may be certified for court, but only the more commonly certified products are available for online ordering of certification. For ordering certified copies of items where certifications are not offered online, please contact NCEI. For more information on certifications, see the Certification of Data page.
- Online means available through our website for electronic delivery, although some items ordered online may require delivery by mail and those are subject to a service charge. Some orders could be subject to a consultation fee or handling charge.
- Offline means the data type is not available through our web site. Contact NCEI for availability, pricing and ordering information. Many items cost more when ordered offline.
- Some products require Adobe Acrobat Reader for viewing.
- All prices are subject to change.
