Should I open an issue on this?
On 12/18/2013 11:47 AM, Wes Freeman wrote:
>
> And yeah you're right, ::1 doesn't work in the config file (which is
> odd), but if you bind to :: you can connect to ::1. Just tested with
> my go driver using the following connection string:
> db, err := sql.Open("neo4j-cypher", "http://[::1]:7474/";)
>
> Wes
>
> On Wed, Dec 18, 2013 at 1:22 PM, Alan Robertson <[email protected]
> <mailto:[email protected]>> wrote:
>
> I meant to say "::1". Right now, it won't hear local only ipv6
> connections...
>
> But your suggested query doesn't have to touch the data store at
> all. Right?
>
> I would assume that either of the others I gave would touch the
> data store, and would typically fail of the data store was hung or
> broken...
>
> I would assume your suggested query would not touch the data store.
>
> Is that a correct understanding?
>
>
>
>
> On 12/18/2013 11:13 AM, Wes Freeman wrote:
>> You can make it listen on :: if you set it in
>> neo4j-server.properties:
>> # Let the webserver only listen on the specified IP. Default is
>> localhost (only
>> # accept local connections). Uncomment to allow any connection.
>> Please see the
>> # security section in the neo4j manual before modifying this.
>> org.neo4j.server.webserver.address=::
>>
>> My favorite ultra-simple 2.0 query is "RETURN 1;"--which works
>> even if db is totally empty.
>>
>> Wes
>>
>> On Wed, Dec 18, 2013 at 10:56 AM, Alan Robertson <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Thanks for the explanation. I have always (mistakenly)
>> thought of the type of the relationship as a sort of property.
>>
>> In any case, the script seems to work quite nicely, and is
>> easy to autogenerate the parameters for from Assimilation
>> discovery information.
>>
>> I discovered something surprising (a bug?) about curl --
>> unless I give it the -g flag (don't expand globs), then it
>> doesn't like ipv6 IP/port combinations - like
>> [::ffff:127.0.0.1]:7474. IMHO, it shouldn't be trying to
>> glob IP addresses...
>>
>> I noticed that neo4j doesn't appear to be ipv6 compliant
>> (i.e., it doesn't listen on '::'). Is that intentional?
>>
>> In any case, the script seems to give neo4j some trivial, but
>> meaningful exercise. You have to parse the query, optimize
>> it, create a query plan, execute it, walk through the
>> results, convert them to JSON and send them back out the REST
>> interface. Quite a few things have to be working for it to
>> succeed.
>>
>> Do you have a favorite trivial query that will succeed in any
>> non-empty neo4j database?
>>
>> Do you have a better grep pattern for matching correct output?
>>
>>
>>
>> On 12/17/2013 11:18 PM, Michael Hunger wrote:
>>> return type(r)
>>>
>>> Empty curly braces mean no props
>>>
>>> Sent from mobile device
>>>
>>> Am 18.12.2013 um 06:41 schrieb Alan Robertson <[email protected]>
>>> <mailto:[email protected]>:
>>>
>>>> The query in the script below produces the following output:
>>>>
>>>> {"results":[{"columns":["one","rel","two"],"data":[{"row":[{"domain":"metadata","nodetype":"CMAclass","name":"HbRing"},{},{"domain":"metadata","nodetype":"CMAclass","name":"CMAclass"}]}]}],"errors":[]}
>>>>
>>>> What I noticed is that the relationship shows up as {}. Do I need
>>>> to
>>>> change the query to get the relationship type? [See the script
>>>> below
>>>> for the query]
>>>>
>>>> In any case, below is a script which does a passable job of seeing
>>>> if
>>>> Neo4j is operational (and not dead, comatose, or laying on the
>>>> ground
>>>> twitching)... I'm going to write an OCF resource agent using it -
>>>> so I
>>>> can monitor neo4j "properly". And I could also make it
>>>> highly-available
>>>> using Pacemaker...
>>>>
>>>> It can use either wget or curl to talk to Neo4j.
>>>>
>>>> #
>>>> # Simple script to monitor Neo4j for basic operation
>>>> #
>>>> # Potential inputs to this script are:
>>>> # ipport: IP-port combination of the neo4j REST server
>>>> # cypher: Cypher query string
>>>> # regex: Regular expression to match server output against
>>>> # grepflags: flags to give grep
>>>> ipport='127.0.0.1:7474 <http://127.0.0.1:7474>'
>>>> ipport='[::ffff:127.0.0.1]:7474'
>>>> cypher="START one=node(*) RETURN one LIMIT 1"
>>>> # Need at least one node and one relationship for this one to
>>>> succeed...
>>>> cypher="START one=node(*) MATCH one-[rel]->two RETURN one, rel,
>>>> two LIMIT 1"
>>>> regex='^{ *"results" *: *\[.*\] *, *"errors" *: *\[ *\] *}$'
>>>> grepflags=""
>>>> #
>>>> # Other variables in the script
>>>> # queryjson: JSON-encapsulated version of cypher query
>>>> # committrans: url suffix for committing transactions in one go
>>>> # URL: URL to give to Neo4j REST service
>>>> # header: Extra header information to give REST service
>>>> (i.e.,
>>>> Content-type)
>>>> queryjson="{\"statements\" : [ { \"statement\" : \"$cypher\" } ] }"
>>>> committrans='db/data/transaction/commit'
>>>> URL=http://${ipport}/${committrans}
>>>> header='Content-type: application/json'
>>>> use_wget=1
>>>>
>>>> runquery() {
>>>> if
>>>> [ "$use_wget" -eq 1 ]
>>>> then
>>>> wget -q --header="${header}" --post-data="$queryjson"
>>>> --output-document=- $URL
>>>> else
>>>> curl -s -g --header "${header}" --data "$queryjson"
>>>> --output
>>>> - $URL
>>>> fi
>>>> }
>>>> monitor() {
>>>> runquery | grep ${grepflags} "${regex}" >/dev/null
>>>> }
>>>> runquery
>>>> monitor
>>>> rc=$?
>>>> echo $rc
>>>> exit $rc
>>>>
>>>>
>>>>
>>>> --
>>>> Alan Robertson <[email protected]> <mailto:[email protected]> -
>>>> @OSSAlanR
>>>>
>>>> "Openness is the foundation and preservative of friendship... Let
>>>> me claim from you at all times your undisguised opinions." - William
>>>> Wilberforce
>>>>
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>>
>>
>> --
>> Alan Robertson <[email protected]> <mailto:[email protected]> - @OSSAlanR
>>
>> "Openness is the foundation and preservative of friendship... Let
>> me claim from you at all times your undisguised opinions." - William
>> Wilberforce
>>
>>
>
>
> --
> Alan Robertson <[email protected]> <mailto:[email protected]> - @OSSAlanR
>
> "Openness is the foundation and preservative of friendship... Let me
> claim from you at all times your undisguised opinions." - William Wilberforce
>
>
--
Alan Robertson <[email protected]> - @OSSAlanR
"Openness is the foundation and preservative of friendship... Let me claim
from you at all times your undisguised opinions." - William Wilberforce
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