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OptionsSupport.java
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Created
Tue, Aug 20, 07:59
Size
5 KB
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text/x-java
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Thu, Aug 22, 07:59 (2 d)
Engine
blob
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Handle
20034406
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R7507 YCSB
OptionsSupport.java
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/*
* Copyright (c) 2014, Yahoo!, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License. See accompanying
* LICENSE file.
*/
package
com.yahoo.ycsb.db
;
import
java.util.Properties
;
/**
* OptionsSupport provides methods for handling legacy options.
*
* @author rjm
*/
public
final
class
OptionsSupport
{
/** Value for an unavailable property. */
private
static
final
String
UNAVAILABLE
=
"n/a"
;
/**
* Updates the URL with the appropriate attributes if legacy properties are
* set and the URL does not have the property already set.
*
* @param url
* The URL to update.
* @param props
* The legacy properties.
* @return The updated URL.
*/
public
static
String
updateUrl
(
String
url
,
Properties
props
)
{
String
result
=
url
;
// max connections.
final
String
maxConnections
=
props
.
getProperty
(
"mongodb.maxconnections"
,
UNAVAILABLE
).
toLowerCase
();
if
(!
UNAVAILABLE
.
equals
(
maxConnections
))
{
result
=
addUrlOption
(
result
,
"maxPoolSize"
,
maxConnections
);
}
// Blocked thread multiplier.
final
String
threadsAllowedToBlockForConnectionMultiplier
=
props
.
getProperty
(
"mongodb.threadsAllowedToBlockForConnectionMultiplier"
,
UNAVAILABLE
).
toLowerCase
();
if
(!
UNAVAILABLE
.
equals
(
threadsAllowedToBlockForConnectionMultiplier
))
{
result
=
addUrlOption
(
result
,
"waitQueueMultiple"
,
threadsAllowedToBlockForConnectionMultiplier
);
}
// write concern
String
writeConcernType
=
props
.
getProperty
(
"mongodb.writeConcern"
,
UNAVAILABLE
).
toLowerCase
();
if
(!
UNAVAILABLE
.
equals
(
writeConcernType
))
{
if
(
"errors_ignored"
.
equals
(
writeConcernType
))
{
result
=
addUrlOption
(
result
,
"w"
,
"0"
);
}
else
if
(
"unacknowledged"
.
equals
(
writeConcernType
))
{
result
=
addUrlOption
(
result
,
"w"
,
"0"
);
}
else
if
(
"acknowledged"
.
equals
(
writeConcernType
))
{
result
=
addUrlOption
(
result
,
"w"
,
"1"
);
}
else
if
(
"journaled"
.
equals
(
writeConcernType
))
{
result
=
addUrlOption
(
result
,
"journal"
,
"true"
);
// this is the
// documented option
// name
result
=
addUrlOption
(
result
,
"j"
,
"true"
);
// but keep this until
// MongoDB Java driver
// supports "journal" option
}
else
if
(
"replica_acknowledged"
.
equals
(
writeConcernType
))
{
result
=
addUrlOption
(
result
,
"w"
,
"2"
);
}
else
if
(
"majority"
.
equals
(
writeConcernType
))
{
result
=
addUrlOption
(
result
,
"w"
,
"majority"
);
}
else
{
System
.
err
.
println
(
"WARNING: Invalid writeConcern: '"
+
writeConcernType
+
"' will be ignored. "
+
"Must be one of [ unacknowledged | acknowledged | "
+
"journaled | replica_acknowledged | majority ]"
);
}
}
// read preference
String
readPreferenceType
=
props
.
getProperty
(
"mongodb.readPreference"
,
UNAVAILABLE
).
toLowerCase
();
if
(!
UNAVAILABLE
.
equals
(
readPreferenceType
))
{
if
(
"primary"
.
equals
(
readPreferenceType
))
{
result
=
addUrlOption
(
result
,
"readPreference"
,
"primary"
);
}
else
if
(
"primary_preferred"
.
equals
(
readPreferenceType
))
{
result
=
addUrlOption
(
result
,
"readPreference"
,
"primaryPreferred"
);
}
else
if
(
"secondary"
.
equals
(
readPreferenceType
))
{
result
=
addUrlOption
(
result
,
"readPreference"
,
"secondary"
);
}
else
if
(
"secondary_preferred"
.
equals
(
readPreferenceType
))
{
result
=
addUrlOption
(
result
,
"readPreference"
,
"secondaryPreferred"
);
}
else
if
(
"nearest"
.
equals
(
readPreferenceType
))
{
result
=
addUrlOption
(
result
,
"readPreference"
,
"nearest"
);
}
else
{
System
.
err
.
println
(
"WARNING: Invalid readPreference: '"
+
readPreferenceType
+
"' will be ignored. "
+
"Must be one of [ primary | primary_preferred | "
+
"secondary | secondary_preferred | nearest ]"
);
}
}
return
result
;
}
/**
* Adds an option to the url if it does not already contain the option.
*
* @param url
* The URL to append the options to.
* @param name
* The name of the option.
* @param value
* The value for the option.
* @return The updated URL.
*/
private
static
String
addUrlOption
(
String
url
,
String
name
,
String
value
)
{
String
fullName
=
name
+
"="
;
if
(!
url
.
contains
(
fullName
))
{
if
(
url
.
contains
(
"?"
))
{
return
url
+
"&"
+
fullName
+
value
;
}
return
url
+
"?"
+
fullName
+
value
;
}
return
url
;
}
/**
* Hidden Constructor.
*/
private
OptionsSupport
()
{
// Nothing.
}
}
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