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Treessence

Some trees for Timber lib

Set up

build.gradle

repositories {
    jcenter()
    maven { url "https://jitpack.io" }
}

dependencies {
    //Treessence does not include Timber
    implementation 'com.jakewharton.timber:timber:4.7.1'
    implementation 'com.github.bastienpaulfr:Treessence:1.0.0'
}

Usage

  1. Checkout Timber
  2. Add any trees you like

Essences of tree

Console

ThrowErrorTree

An implementation of Timber.Tree which throws Error when priority of log is exceeded the limit. Useful for development or test environment.

// Will throw an error if Timber.e() is used
Timber.plant(new ThrowErrorTree(Log.ERROR));

SystemLogTree

An implementation of Timber.Tree which logs into System.out

Timber.plant(new SystemLogTree());

File Logging

FileLoggerTree

An implementation of Timber.Tree which sends log into a circular file. java.util.logging.Logger is used for logging

Tree t = new FileLoggerTree.Builder()
                     .withFileName("file%g.log")
                     .withDirName("my/dir")
                     .withSizeLimit(20000)
                     .withFileLimit(3)
                     .withMinPriority(Log.DEBUG)
                     .appendToFile(true)
                     .build();
Timber.plant(t);

Crash reporting

SentryBreadcrumbTree

An implementation of Timber.Tree which stores breadcrumb to Sentry instance. Breadcrumbs are then sent with an event.

You need to add sentry dependency to use this tree.

Timber.plant(new SentryBreadcrumbTree(Log.DEBUG));

SentryEventTree

An implementation of Timber.Tree which sends Sentry events. It is useful for sending errors or logs that are not coming so often. Otherwise your sentry instance will be flooded !

You need to add sentry dependency to use this tree.

Timber.plant(new SentryEventTree(Log.ERROR));

You can also add a filter for SentryEvent

// This will send an event to Sentry only if priority exceeds "ERROR" level and class name starts with "Sentry"
TagFilter filter = new TagFilter("Sentry.*");
SentryEventTree tree = new SentryEventTree(Log.INFO, filter);
Timber.plant(tree);

Custom formatting

It is possible to use a custom formatter with trees.

SystemLogTree tree = new SystemLogTree(Log.VERBOSE, NoFilter.INSTANCE, LogcatFormatter.INSTANCE);

For timezone issue, a custom timezone can be set

// Create object that will provide timestamp string
TimeStamper timeStamper = new TimeStamper("MM-dd HH:mm:ss:SSS", TimeZone.getTimeZone("GMT+2"))
// Set time stamper to LogcatFormatter
LogcatFormatter.INSTANCE.setTimeStamper(timeStamper);
// Formatter can be set to a Tree
[...]

DSL

Since version 1.0, there is a Kotlin dsl to configure Timber in Applications

Starting Timber

//Create a TimberApplication to configure Timber.
startTimber {

}

Adding trees

startTimber {
    // Add a Timber.DebugTree
    debugTree()


    // Add a Tree that log only from Log.INFO level
    releaseTree()

    // Add a simple tree with a filter and a formatter
    tree(
        { s: String, t: Throwable? ->
        // Log goes through this method and it is up to you to write those where you want
        }
    ) {
        level = Log.INFO

        filter(NoFilter())

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a Tree that log into logcat
    logcatTree {
        level = Log.INFO

        filter(NoFilter())

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a tree that log into a file
    fileTree {
        level = Log.INFO
        fileName = "myfile"
        dir = temporaryFolder.newFolder().absolutePath
        sizeLimit = 10
        fileLimit = 1
        appendToFile = true

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a tree that log using System.out.print()
    systemTree {
        level = Log.INFO

        filter(NoFilter())

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a tree that is throwing an exception when Timber.e() is called
    throwErrorTree {
        level = Log.INFO

        filter(NoFilter())

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a tree that put breadcrumb into Sentry API
    sentryBreadCrumbTree {
        level = Log.VERBOSE

        filter(TagFilter("^(?!.*(Sentry|App)).*"))

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a tree that sends an event to sentry on each log.
    sentryEventTree {
        level = Log.ERROR

        filter(TagFilter("^(?!.*(Sentry|App)).*"))

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }

    // Add a tree that is logging into a TextView
    textViewTree {
        level = Log.INFO
        append = true

        filter(NoFilter())

        filter { prio, tag, m, t ->
            false
        }

        formatter { prio, tag, message ->
            ""
        }
    }
}

Uproot all trees

stopTimber()

Licence

Copyright [2017] Bastien PAUL

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.